Sea urchins. Medical search. Frequent questions

The "fuzz" are actually the SPINES on a very strange looking sea urchin! (blogspot.com)
2. Spines in "regular" urchins are usually elongate and pointed. (blogspot.com)
Long-spined sea urchins ( Diadema antillarum ) once peppered Caribbean reefs in the millions, but in 1983 urchins began losing their spines, dying and vanishing from the reef within a matter of days. (newscientist.com)
After a few days, 60 per cent of the urchins lost their spines and looked identical to the animals that were dying in the field," says Hewson, suggesting P. apodigitiformis was the cause. (newscientist.com)
This species of sea urchin gets it name from its thick spines that look a bit like pencils. (visitsealife.com)
Sea urchin granuloma is a chronic granulomatous skin disease caused by frequent and successive penetration of sea urchin spines which have not been removed from wounds. (scielo.br)
severe trauma can be provoked by fish stings, teeth, or spines, and sea urchin spines. (scielo.br)
At first, the mortality event was linked only to black sea urchins-Diadema antillarum-which are recognizable by their extremely long, skinny spines. (phys.org)
She said dive shops in St. Lucia and other Caribbean islands have reported ocean floors littered with sea urchin spines or sea urchins floating in the water when they are normally anchored to a reef via hydraulic structures known as tube feet. (phys.org)
Divers also have found dying sea urchins with droopy spines or with their white skeletons poking through their bodies. (phys.org)
Typical sea urchins have spines 1-2 cm in length (e.g. (academickids.com)
The ordinary phrase "sea urchin" actually includes several different taxonomic groups: the Echinoida and the Cidaroida or "slate-pencil urchins", which have very thick, blunt spines (see image at right), and others (see taxobox). (academickids.com)
In most urchins, a light touch elicits a prompt and visible reaction from the spines, which converge toward the point that has been touched. (academickids.com)
A sea urchin has no visible eyes, legs or means of propulsion, but it can move freely over surfaces by means of its adhesive tube feet, working in conjunction with its spines. (academickids.com)
The spines , which in some species are long and sharp, serve to protect the urchin from predators . (academickids.com)
The Paracentrotus lividus or sea urchin is a herbivorous animal with long and robust spines that lives in the rocky seabeds and marine phanerogamic meadows of the Mediterranean Sea and the Atlantic Ocean. (csic.es)
Most sea urchin injuries result when spines break off in the skin and cause local tissue reactions. (msdmanuals.com)

Aaron Pilnick, a post-doctoral researcher at TAL, led newly published research that identifies substrates that help long-spined sea urchins -- scientifically known as Diadema -- grow from larvae to juveniles in a lab setting. (sciencedaily.com)
The team had first heard reports in January that a sea urchin species off Eilat was dying rapidly, so they went to a site known for an abundance of the species Diadema setosum. (gulfnews.com)
The team found that it affected two kinds of sea urchin, Diadema setosum and Echinothrix calamaris, while other species in the same environment remained unharmed. (gulfnews.com)
Early last year, Breitbart started hearing that the Diadema antillarum species - similar to those affected in the Red Sea - was rapidly changing behaviour and then dying in droves in the Caribbean. (gulfnews.com)
Gal Eviatar, a student at the Tel Aviv University, uses a tong to hold a Diadema Setosum sea urchin in an aquarium at the Inter-University Institute for Marine Sciences, in Israel's Red Sea resort of Eilat. (gulfnews.com)
The long-spined sea urchin's ( Diadema antillarum ) population in the Caribbean has been devastated by a parasite. (deeperblue.com)
The long-spined sea urchin Diadema antillarum has been the focus of multiple studies since the mass mortality event in the 1980s. (cambridge.org)

By the following year, 98 per cent of Caribbean long-spined sea urchins were gone. (newscientist.com)
Scientists call long-spined sea urchins "the lawn mowers of the reefs" because they eat algae that could otherwise smother reef ecosystems and kill corals. (sciencedaily.com)
Now that UF/IFAS scientists have identified conditions for long-spined sea urchins to grow from larvae to juveniles, they're studying how to get them to mature to adulthood, said Josh Patterson, a UF/IFAS associate professor of restoration aquaculture in the School of Forest, Fisheries, & Geomatics Sciences, Pilnick's supervisor and a Florida Sea Grant-affiliated researcher. (sciencedaily.com)

The phylum Echinoderma include more than 6000 species of starfish, sea urchins, sand dollars, and sea cucumbers some of which have been found responsible for injuries to humans. (scielo.br)
Echinoderms are part of a phylum of cosmopolite and common animals with radial symmetry which includes more than 6000 species of starfish, sea urchins, sand dollars, and sea cucumbers. (scielo.br)
Purple urchin attacked by starfish, Coronados. (oceanlight.com)
Sea urchins are echinoderms (phylum Echinodermata ), which also includes starfish , sea cucumbers , Brittle-stars , and crinoids . (academickids.com)
The phylum Echinodermata includes a diverse group of marine animals that are slow moving and nonaggressive, including brittle stars (class Ophiuroidea), starfish (class Asteroidea), sea urchins (class Echinoidea), and sea cucumbers (class Holothuroidea). (medscape.com)
Of the phylum Echinodermata, only starfish (class Asteroidea), sea urchins (class Echinoidea), and sea cucumbers (class Holothuroidea) are capable of envenomation. (medscape.com)

They combine the gametes in tanks and the fertilized eggs become microscopic urchin larvae, which look like tiny translucent spaceships and feed on phytoplankton. (popsci.com)
After four to six months, these larvae have metamorphosed into bottom-dwelling sea urchins 15 millimeters in diameter-ready to be scooped up and strategically placed into the reefs. (popsci.com)
Scientists from Newcastle University were studying how marine organisms absorb CO2 to make shells and skeletons when they discovered that sea urchin larvae have a high concentration of nickel on their exoskeletons, which helps them absorb CO2. (yale.edu)
For this reason, the team is hoping the successes of abalone farming can be replicated with urchins, grown from larvae. (thefishsite.com)
Researchers found that sea urchin larvae grew into juvenile sea urchins on two types of algae commonly found on the floor of Caribbean coral reefs. (sciencedaily.com)
They then transferred the larvae to petri dishes, containing seawater and various substrates and recorded if they became juvenile sea urchins. (sciencedaily.com)
Urchin larvae float and swim around the ocean until they find a place on the sea floor to attach and transform into a juvenile sea urchin. (sciencedaily.com)

Sea urchins are spiny sea creatures of the class Echinoidea found in oceans all over the world. (academickids.com)
Within the echinoderms, sea urchins are classified as echinoids (class Echinoidea). (academickids.com)
Besides sea urchins, the Echinoidea also includes three groups of "irregular" echinoids: flattened sand dollars , sea biscuits , and heart urchins . (academickids.com)

paracentrotus lividus sea urchin gonads, water, salt. (fallonandbyrne.com)
In the study, the team compared in the laboratory the movement patterns of the P. lividus depending on whether they are exposed or not to the smell of one of their main predators: the sea snail Hexaplex trunculus . (csic.es)
Toxicity: There are data for 3 trophic levels, most sensitive Sea urchin (Paracentrotus lividus) NOEC 2 microg/L. (janusinfo.se)

Staff bring in wild-caught sea urchins each month to the hatchery, where they gently shake the echinoderms to induce spawning. (popsci.com)
Other echinoderms like sea stars also have a water system. (asu.edu)

These sea urchins often graze on algae an live out in the open on reefs or kelp beds. (blogspot.com)
In a "regular" sea urchin, the Aristotle's Lantern or Jaw (seen here from the inside with the rest of the body removed) is used to feed on algae and its positioned as such. (blogspot.com)
The urchins continue to keep algae at bay, and there isn't any vacuuming going on in Kāneʻohe Bay right now, says David Cohen, manager of the sea urchin hatchery at Honolulu. (popsci.com)
When urchin numbers swell disproportionately, they ravage kelp forests and algae-a food source-causing the demise of other species that rely on kelp for food or shelter. (labmanager.com)
Scientists are trying to raise as many urchins as possible because they eat algae that could otherwise smother reef ecosystems and kill corals. (sciencedaily.com)
Researchers have identified algae on which larval sea urchins grow into juveniles in a lab setting. (sciencedaily.com)
However, these reefs also need more urchins to protect corals from algae," said Pilnick, who led the research while a doctoral student in the UF/IFAS College of Agricultural and Life Sciences. (sciencedaily.com)
Walking along the beach, she also picked up handfuls of algae, to feed to the sea urchins still alive in tanks. (gulfnews.com)
The deaths are of concern because sea urchins are herbivores known for being efficient grazers that remove macro algae from coral reefs and clear space for baby sea corals to attach themselves, the two scientists said. (phys.org)
Overfishing across the Caribbean already had led to a greater abundance of macro algae, which was kept in check by sea urchins that are now dying, said Shamal Connell, an officer with St. Vincent and the Grenadines' Fisheries Service who oversees research. (phys.org)
Sea urchins feed mainly on algae . (academickids.com)

In bubbling vents off the coast of Ischia, a volcanic island in the Gulf of Naples, lives a curious population of black sea urchins. (labmanager.com)
Purple and black sea urchins on a rocky reef. (oceanlight.com)

Sea Cucumbers! (blogspot.com)
See and touch an array of marine life that can be found in local tide pools, including beautiful sea stars, sea cucumbers and much more. (visitsealife.com)
Ocular exposure to holothurin toxins and tentacular fragments following exposure to the organs of Cuvier of sea cucumbers requires a thorough slit lamp examination for retained foreign bodies and evidence of corneal abrasion or keratitis. (medscape.com)

Fish swim by the coral reef in the waters of the Red Sea near the southern Israeli city of Eilat on September 14, 2023. (gulfnews.com)
See the results from August 2023, and stay tuned for updates from the California Fish & Game Commission on the future of urchin barren management. (reefcheck.org)

So far, the Honolulu hatchery is the only operation growing urchins to help protect reefs, and the urchins have only been used in Kāneʻohe Bay at this point, says Cohen. (popsci.com)
The Red Sea's spectacular coral reefs face a new threat, marine biologists warn - the mass death of sea urchins that may be caused by a mystery disease. (gulfnews.com)
Sea urchins are dying across the Caribbean at a pace scientists say could rival a mass die-off that last occurred in 1983, alarming many who warn the trend could further decimate already frail coral reefs in the region. (phys.org)
Coral reefs also provide protection from rising seas and storm surges generated by hurricanes that have grown more powerful with global warming, and they are a key attraction for a region that relies heavily on tourism. (phys.org)

Temperature stress, scientists are learning, causes the most damage to kelp forests - but factors like increased sea urchin populations, which have bloomed as a result of sea star population decline, play a role, too. (thetyee.ca)
Much of this can be attributed to rising sea temperatures assisting the expansion of sea urchin populations, as the water becomes warm enough for their offspring to survive. (labmanager.com)
They exposed lab-fertilized embryos from populations of urchins living in and outside the CO 2 vents to a wide temperature range: between 16 and 34°C. The water around Ischia is typically 24°C. (labmanager.com)
Kramer noted that very few black sea urchin populations recovered from the 1983 event that began in the Atlantic Ocean near the Panama Canal and spread northward and then eastward over the next 13 months. (phys.org)

There are five teeth in most sea urchins and they are part of the organ called Aristotle's lantern. (asu.edu)

Sea urchin eggs have a golden color. (asu.edu)
While alkaloids often exert unique pharmacological effects on animal cells, exposure of sea urchin eggs to nicotine causes polyspermy at fertilization in a dose-dependent manner. (mdpi.com)

The urchins had been making a slow recovery in the 40 years since, until the mystery killer struck again in January 2022, this time wiping out up to 95 per cent of the remaining population in the Caribbean. (newscientist.com)
To investigate, Hewson's collaborators in the Caribbean collected both healthy and diseased urchins from 23 different reef sites. (newscientist.com)
The cause of [long-spined sea urchin] die-offs in the Caribbean has long been a mystery," says Michael Sweet at the University of Derby in the UK. (newscientist.com)
A similar mass mortality earlier hit sea urchins in the Caribbean, raising speculation that a disease may have arrived in the Red Sea by ships, whose ballast water can carry pathogens and exotic species. (gulfnews.com)
Within months she and scientists working across the Caribbean had pinpointed a pathogen, giving hope that the cause of the Red Sea die-off could be discovered. (gulfnews.com)
Are we talking about the same pathogen, for example, as the one that hit the Caribbean" in the 1980s, asked Bronstein, who runs a laboratory at the university where sea urchins lie in glass jars. (gulfnews.com)
The deaths worry Kramer and other scientists including Dana Wusinich-Mendez, Atlantic-Caribbean team lead for the U.S. National Oceanic and Atmospheric Administration's coral reef conservation program: "Losing our sea urchins would be really devastating. (phys.org)
In mid-March, the Dutch Caribbean island of Saba reported similar deaths, noting that 50% of the sea urchin population in its harbor was dead a week later. (phys.org)
Meanwhile, Monique Calderon, a fisheries biologist with the government of St. Lucia, said scientists on the eastern Caribbean island are considering launching their own survey to get more details about where the sea urchins are dying and why. (phys.org)
The loss of sea urchins comes amid coral bleaching events resulting from high ocean temperatures and the presence of a disease known as stony coral tissue loss that has affected more than 30 coral species in nearly two dozen countries and territories in the Caribbean, according to the Atlantic and Gulf Rapid Reef Assessment program. (phys.org)

On behalf of sea urchin and abalone divers, lobster trappers, and other fishermen, PLF asked the U.S. Supreme Court to review the case to enforce the separation of powers in the Constitution. (pacificlegal.org)
A pilot system is being built at Viking Aquaculture's Buffeljags Abalone Farm, where abalone is currently farmed alongside Ulva rigida (sea lettuce). (thefishsite.com)

Researchers then added the living ciliate to tanks with healthy sea urchins in the lab. (newscientist.com)
Researchers still don't know what triggers a P. apodigitiformis outbreak in urchins, but hope the work is the first step in developing ways to control its spread, a task Hewson says will be extremely challenging in an aquatic environment. (newscientist.com)
British researchers have discovered that sea urchins use nickel particles on their exoskeletons to effectively capture CO2 and turn it into a solid form, an intriguing finding that could offer an inexpensive way to capture and store carbon from fossil fuel-fired power plants. (yale.edu)
The project includes a team of three University of Cape Town (UCT)-affiliated researchers, who are looking into ways to raise sea urchin ( Tripneustes gratilla ). (thefishsite.com)
Now, University of Sydney researchers have determined they can also tolerate unprecedentedly warm sea temperatures-another climate change by-product. (labmanager.com)
That's why researchers affiliated with the University of Florida Tropical Aquaculture Lab (TAL), who work at the Florida Aquarium's Conservation Campus in Apollo Beach, are trying to raise as many urchins as possible. (sciencedaily.com)
There, researchers induced the urchins to spawn in captivity. (sciencedaily.com)

Omri Bronstein, from the University of Tel Aviv, examines a jar containing Echinothrix Calamaris sea urchins, in the storage facility at the Steinhardt Museum of Natural History in the Israeli Mediterranean coastal city of Tel Aviv. (gulfnews.com)

Those funny "dollar shaped shells" that one often finds walking along a beach down by the sea shore. (blogspot.com)
All shells and sea life vary in size and shape. (paxtongate.com)
Sea urchin shells are a natural and attractive vessel to serve sea urchin caviar and other dishes prepared with seafood, seaweed or fish. (gourmets.net)

You might not know it, but sea urchins have a fivefold symmetry just like sea stars. (asu.edu)
While the sea star's five arms make it easy to see its symmetry, it is not as obvious that the closely related sea urchin also has a fivefold symmetry. (asu.edu)
Sea urchin shell showing its fivefold symmetry. (asu.edu)

What's left-a rocky, sandy, urchin-filled seafloor-is known as an "urchin barren. (labmanager.com)

The urchin has, also, five hollow teeth inside, and in the middle of these teeth a fleshy substance serving the office of a tongue. (academickids.com)

Thorny sea stars are a species of sea star found in the Indo Pacific regions. (visitsealife.com)
There are more than 900 species of sea urchins and they come in a range of colors including purple, blue, brown, green, and red. (asu.edu)

This summer, the National Oceanic and Atmospheric Administration announced that 500,000 hatchery-raised sea urchins now reside in Kāneʻohe Bay, off the coast of O'ahu. (popsci.com)
According to a press release from UCT, the project will build on previous sea urchin aquaculture research by Dr Cyrus and the team that has successfully developed innovative hatchery and grow-out technologies. (thefishsite.com)
The state of Hawaii spent $1 million on a sea urchin hatchery and $300,000 for an engineering assessment of the now-condemned Aloha Stadium. (hawaiifreepress.com)

We saw numerous coral and sea fans knocked over. (reefcheck.org)

Specifically, the term "sea urchin" refers to the "regular echinoids," which are symmetrical and globular. (academickids.com)

It then describes the main techniques used for stock monitoring in sea urchin fisheries around the world, including techniques used in the NPA. (nofima.no)

Purple sea urchins on rocky reef amid kelp forest. (oceanlight.com)
As a result, the population of sea urchins has multiplied and they are chewing up the kelp forest in the area and upsetting the ecosystem . (academickids.com)

A few sea urchins (eg, Globiferous pedicellariae ) have calcareous jaws with venom organs, enabling them to inject venom, but injuries are rare. (msdmanuals.com)

This shows that in all likelihood Seabed Harvester is the most efficient harvest method for sea urchins in demanding winter conditions in Northern Norway, says Scientist Philip James from Nofima. (thefishsite.com)
The market value of these sea urchins has been calculated as NOK 6.2 billion by Nofima. (thefishsite.com)

This means that these urchins, already one of the most abundant animals in the Mediterranean Sea, will likely plunder further afield as oceans continue to warm and become more acidic. (labmanager.com)
The Mediterranean Sea is warming 20 percent faster than the global average, with predicted warming of up to 5.8°C by 2100. (labmanager.com)
Given their ability to withstand a large temperature range, these sea urchins are likely to continue spreading throughout the Mediterranean Sea, with serious consequences for coastal habitats," said lead researcher, University of Sydney marine biologist Dr. Shawna Foo. (labmanager.com)
The Mediterranean Sea is only predicted to reach temperatures this high in the peak of summer in around 30 years-by 2050. (labmanager.com)

Native sea urchins are good creatures to use for biocontrol, says Wall, because they're not very mobile and have existing predators to keep their population in check. (popsci.com)
In short, sea urchins can perceive the chemistry of their predators and react instantly by changing their movement patterns. (csic.es)

His research looks to improve production technologies and to develop feeds and feed additives (probiotic and seaweed-supplemented diets) as well as IMTA technology for farmed aquatic animals, especially sea urchins. (thefishsite.com)

To reach their findings, UF/IFAS scientists relied on the Florida Fish and Wildlife Conservation Commission to bring adult urchins from the Florida Keys to the Florida Aquarium Conservation Campus. (sciencedaily.com)
Once adult purple sea urchins have reached sexual maturity, females and males release gametes into the ocean, a mode of external fertilization. (oceanlight.com)

We're probably looking at millions [of urchin deaths] across the entire region," says Ian Hewson at Cornell University in New York. (newscientist.com)
Dive shops first began reporting the deaths in February, perplexing scientists and worrying government officials who are receiving a growing number of reports about dying sea urchins from islands including Antigua, St. Lucia, Dominica, Jamaica, St. Vincent, Saba and the U.S. Virgin Islands as well as Cozumel in Mexico. (phys.org)

The pentamerous symmetry is not obvious at a casual glance, but is easily seen in the dried shell of the urchin (see picture below, right). (academickids.com)
Constructed in silver with freshwater pearl and recycled glass accents, the Sea Collection tells a story of symmetry and pattern created by natural movements. (mignonfaget.com)

These fascinating creatures come in a variety of colors, shapes, and sizes, and are also known as sea stars. (visitsealife.com)

After four days the ROV had harvested a total of 1.88 tonnes, of which 35 per cent was high export quality sea urchins. (thefishsite.com)
Estimates show there may be up to 80 billion individual sea urchins along the Norwegian coast, which constitutes 56,000 tonnes. (thefishsite.com)
The market in France, on the other hand, is small or estimated at 350-450 tonnes of sea urchins on an annual basis. (matis.is)
There may be a need for more quantities of sea urchins on the market at the right price as the market was larger in previous years or about 1,000 tonnes. (matis.is)
Worldwide the supply of sea urchins has diminished in the last few years, from the peak landings of about 120 thousand tonnes in 1995 to the current levels of about 75 thousand tonnes. (matis.is)

This case, California Sea Urchin Commission, exemplifies the dangers of courts abdicating their oversight role. (pacificlegal.org)
To help recover the California sea otter, Congress authorized the agency to establish a new population of otters in Southern California. (pacificlegal.org)
Purple urchin and strawberry anemones on rocky California reef. (oceanlight.com)
Recently the population of sea otters in the Monterey Bay of California has diminished. (academickids.com)

Purple sea urchin, spawning, releasing gametes into the ocean currents. (oceanlight.com)

Some tasks are carried out at the Marine Research Aquarium in Sea Point, and commercial-scale studies are carried out at the aquafarm at Buffeljags," said Bolton. (thefishsite.com)
The urchins can be used in any aquarium and are available in White, Black and Natural. (aquatix-2u.co.uk)

Sand dollars are members of a specialized sub-group of sea urchins that are often referred to as the "Irregular Urchins" These urchins differ quite a bit from the so-called "Regular" urchins because they show a suite of adaptations to living in sandy/muddy/ bottoms! (blogspot.com)
In "irregular" sea urchins. (blogspot.com)
But those in "irregular urchins" (esp. (blogspot.com)

Instead, the scientific community is working towards establishing a broodstock population of the affected species which can be released into the Red Sea once the current threat has passed. (gulfnews.com)

Mignon Faget's first and most iconic collection, Sea focuses on recognizable elements of Louisiana coastal living. (mignonfaget.com)

We developed a method for preparing male chromosomes from sea urchin hybrid andromerogones created with cryopreserved sperm. (bioone.org)
This method is applicable for analysis of the haploid male chromosome complement in sea urchin species for which only sperm can be obtained. (bioone.org)

The water system of a sea urchin helps control its tube feet, which allow it to move and to grasp food particles. (asu.edu)

Two years after this treatment, the patches of reef that were vacuumed and seeded with urchins had 85 percent less seaweed cover, reports a study on the effort . (popsci.com)
The urchins will clear all kelp off a reef if their population is not held in balance by predictors. (oceanlight.com)

Hewson noticed that the ciliate Philaster apodigitiformis was abundant in sick urchins and absent from healthy ones. (newscientist.com)
Echinolampidse, a family of Sea-urchins of which the type-genus Echinolampas is very abundant in the Lower Cainozoic beds. (sacklunch.net)

They sent urchin tissue samples to Hewson's lab in New York, where he and his colleagues looked for evidence of viruses and pathogens - common culprits of mass die-offs - on a molecular level. (newscientist.com)
Believe it or not, urchins have lips of soft tissue that also have small bony pieces embedded inside. (asu.edu)
Collagenous Extracellular Matrix Biomaterials for Tissue Engineering: Lessons from the Common Sea Urchin Tissue. (bvsalud.org)
This review discusses the key attributes of the structure and function of the ECM of the sea urchin ligaments that are related to the fibril-fibril sliding action-the focus is on the respective components within the hierarchical architecture of the tissue . (bvsalud.org)
The intent of this review is to provide the latest insights, as well as identify technical challenges and opportunities, that may be useful for developing methods for effective mechanical support when adapting decellularised connective tissues from the sea urchin for tissue engineering or for the design of a synthetic analogue. (bvsalud.org)

NORWAY - Several tests show that the remotely-operated underwater vehicle (ROV) Seabed Harvester beats the divers when it comes to harvesting sea urchins one of the worlds highest paid seafood products. (thefishsite.com)

Sand dollars are ANIMALS, specifically they are sea urchin s! (blogspot.com)
Unlike the case of the purposefully invasive mongooses, adding additional sea urchins likely won't create any new problems since these animals are naturally found in this environment. (popsci.com)
On the bright side, however, Foo says the vent urchins' superpower survival abilities may offer insights into adaptations other animals might need to survive as the oceans warm and become more acidic, for example, by determining the genes responsible for their high stress tolerance. (labmanager.com)
Sea urchins aren't the only animals with a water system like this. (asu.edu)
The red sea urchin, Mesocentrotus franciscanus , is one the earth's longest-lived animals, reported to live more than 100 years with indeterminate growth, life-long reproduction and no increase in mortality rate with age. (nature.com)
Alternative sources for collagenous ECM materials may be derived from livestock , e.g., pigs , and from marine animals , e.g., sea urchins . (bvsalud.org)

Worldwide, including on the east coast of Australia and the coastline stretching Nova Scotia to Chile, urchin barrens continually grow. (labmanager.com)
Some countries that fish for sea urchins, especially in Chile, New Zealand and the Philippines, have a domestic tradition of consumption. (matis.is)
There is a domestic market in many sea urchins harvesting countries, especially in Chile, New Zealand and the Philippines. (matis.is)

While related ciliates have been known to infect sharks , this is the first time it has been found to kill sea urchins. (newscientist.com)
These sea urchins can be found all along the coast and around rock pools. (visitsealife.com)
Scientists investigating the serious die-off of the urchins first reported in St. Thomas in the U.S. Virgin Islands found that a parasite is responsible. (deeperblue.com)

Sadly the condition afflicting sea urchins has spread, and by June 2022, it was detected in Florida, Curacao and the Greater Antilles. (deeperblue.com)

Only at 32°C did both types of embryos suffer due to the heat, with more abnormal development than would be seen in a general urchin population. (labmanager.com)
In Israel's Red Sea resort of Eilat, which borders Jordan and Egypt, Schmidt recalled the moment she and her colleagues first witnessed the population collapse. (gulfnews.com)
During that time, only the black sea urchin was affected, with 90% or more of the population dying, though at a much slower rate than the current event, she said. (phys.org)
The mystery disease has been obliterating the sea urchin population, with some areas suffering from declines in numbers between 85% and 95% . (deeperblue.com)

Wave exposure was correlated with the abundance of the sea urchin. (cambridge.org)

24-hour-old embryos from the low pH-acclimated urchins (from the vents) could withstand a greater temperature range than ones living in normal pH-a 12.3°C versus 5.4°C range. (labmanager.com)

Scrambling to find the cause, the scientists watched with growing alarm as the mass mortality spread south through the Red Sea. (gulfnews.com)
Officials in Saba said they have around 200 sea urchins in a nursery and are gathering information about the new mortality event, adding that they are treating some with antibiotics that might cure them or prevent them from getting sick. (phys.org)

Initial injuries by sea urchins are associated with trauma and envenomation, but later effects can be observed. (scielo.br)

The research is financed by the Norwegian Seafood Research Fund (FHF) and is being carried out in collaboration with Norway Sea Urchin AS and 7S-Technology AS. (thefishsite.com)

To restore sea urchins, it's important to know their growth patterns. (sciencedaily.com)

Anatomy14

Organisms13

Chemicals and Drugs6

Analytical, Diagnostic and Therapeutic Techniques and Equipment3

Phenomena and Processes12

Information Science4

Health Care1

Geographicals3

Spines17

Diadema7

Long-spined sea urchins3

Starfish6

Larvae7

Echinoidea3

Lividus3

Echinoderms2

Algae11

Black sea urchins2

Cucumbers3

20232

Reefs4

Populations4

Aristotle's Lantern1

Eggs2

Caribbean10

Abalone2

Researchers7

Echinothrix1

Shells3

Fivefold symmetry3

Barren1

Teeth1

Species of sea2

Hatchery3

Coral1

Echinoids1

Fisheries1

Kelp forest2

Pedicellariae1

Nofima2

Mediterranean Sea4

Predators2

Aquatic1

Adult2

Deaths2

Symmetry2

Colors1

Tonnes5

California4

Gametes1

Aquarium2

Irregular3

Scientific1

Recognizable1

Sperm2

Particles1

Reef2

Abundant2

Tissue5

Underwater1

ANIMALS6

Chile3

Found3

20221

Population4

Exposure1

Vents1

Mortality2

Injuries1

Seafood1

Restore1