Some fish, like sharks and lampreys, possess multiple gill openings. (wikipedia.org)
Unlike lampreys, hagfish have no visible gill pores and have six oral tentacles. (ericbutlerlab.com)
Species3
In place of a jaw, this ancient eel-like fish species has a circular, sucker-like mouth, with lots of teeth. (private-scuba.com)
Most parasitic lampreys are anadromous fish , even though some species spend their whole life in fresh water. (private-scuba.com)
Certain species such as Lampreys are distinguished by the size of their heads as well as a notochord and sensory system. (microbiologynote.com)
Sides1
Dee's obsidian mirror, now in the collection of the British Museum in London, is polished on both sides and is nearly perfectly circular, measuring about 7.2 inches (18.5 centimeters) in diameter and 0.5 inches (13 mm) thick, and weighing about 31 ounces (882 grams). (livescience.com)
Fish2
But at Turners Falls, Northeast Utilities has built state-of-the-art fish ladders that enable the salmon - and many shad as well as undesirable lamprey eels - to bypass their dam. (rd.com)
It includes two separate lineages of fish within it, the lampreys and the hagfish. (ericbutlerlab.com)
Members1
Surviving members of the party were all honoured by Queen Alustriel and given lands and titles near to Silverymoon. (obsidianportal.com)
Spend1
Most of them perish, but some survive and head downriver to spend the next year or two at sea. (rd.com)
Adult lamprey2
Instead, an adult lamprey has a disk-like mouth filled with small sharp teeth. (alaska.gov)
The returning adult lamprey spends up to 18 months inland, maturing sexually before spawning. (sciencelearn.org.nz)
Considered a delicacy2
In parts of Asia, lamprey meat is considered a delicacy and will fetch a higher price per pound than salmon. (alaska.gov)
Lamprey - also called kanakana or piharau - are a taonga species and were considered a delicacy by Māori. (sciencelearn.org.nz)
Anadromous2
Alaska is home to two anadromous species of lamprey - the Pacific lamprey and the arctic lamprey. (alaska.gov)
Lampreys are anadromous - this means they migrate up rivers from the ocean to spawn. (sciencelearn.org.nz)
Juveniles1
Lamprey juveniles (ammocoetes) live in burrows in silty river edges. (sciencelearn.org.nz)
Invasive2
Millions of dollars are spent each year in Wisconsin and Michigan in an attempt to eradicate, or at the very least control, the invasive sea lamprey population. (alaska.gov)
Sea lampreys are an invasive species that are a serious threat to Michigan's $7 billion fishing industry. (newsfulonline.com)
Freshwater1
Before reaching sexual maturity, the lamprey returns to freshwater to breed and can use its circular sucker to latch onto and surmount obstacles such as rapids and small falls. (sciencelearn.org.nz)
Predators2
People wondered if they were caused by other predators, parasitic lice, lampreys with their round toothy suckers, or even bacterial infections. (nationalgeographic.com)
In the Great Lakes, where no such co-evolutionary link exists, sea lampreys act as predators, with each individual capable of killing up to 40 pounds (more than 20 kilograms) of fish over their 12 to 18 month feeding period. (newsfulonline.com)
Nests2
Upon reaching their spawning grounds in fresh water, lampreys construct nests for their eggs. (alaska.gov)
The male digs out a circular shallow depression in the river bottom called nests using its tail to sweep away silt and gravel. (ctriver.org)
Eventually, at the end of their lives, Pacific and arctic lampreys leave the ocean and swim upstream to spawn, back to the same rivers and streams where they were born. (alaska.gov)
Eventually, both Pacific and arctic lampreys leave the ocean to spawn. (alaska.gov)
Consider the fact that some arctic lampreys entering the mouth of the Yukon River swim nearly 2,000 miles upriver well into Canada. (alaska.gov)
Some lifelong Alaskans aren't even aware of this incredible migration because arctic lampreys make this journey in the winter under 3 feet of ice. (alaska.gov)
Despite being relatively small (on average, 10 inches long), the meat of an arctic lamprey is extremely rich. (alaska.gov)
Recently, a small scale commercial fishery of arctic lampreys took place on the Yukon River. (alaska.gov)
This adaption provides insulation, helping them survive in the frigid Arctic climate. (ofacts.org)
Great Lakes5
Sea lampreys were accidentally introduced to the Great Lakes via shipping canals and have become a major problem by adversely affecting the resident commercial and game fish populations. (alaska.gov)
Sea lampreys attach to fish with their suction cup mouth, then dig their teeth into flesh for grip," the Great Lakes Fishery Commission explains. (newsfulonline.com)
In their native Atlantic Ocean, thanks to co-evolution with fish there, sea lampreys are parasites that typically do not kill their host," says the Great Lakes Fishery Commission. (newsfulonline.com)
Host fish in the Great Lakes are often unable to survive sea lamprey parasitism, either dying directly from an attack or from infections in the wound after an attack," the agency says. (newsfulonline.com)
With twisting motions, it scoops out a chunk of flesh, leaving behind circular craters exactly like those that del Villar saw on the great white. (nationalgeographic.com)
It's known as the "vampire fish"-a long, eel-like parasite with a mouth like a circular vacuum attachment it applies to other fish to live off their blood and flesh. (newsfulonline.com)
Eggs1
Maybe we can push them towards a trap or push them towards an area of the river that is unsuitable for their spawning grounds, so maybe their eggs don't survive. (newsfulonline.com)
Rivers1
they not only survived but prospered in their new home rivers. (ctriver.org)
Scientists1
Michigan State scientists are looking into ways to control sea lamprey, particularly to drive them away and into certain areas. (newsfulonline.com)
Sharp1
Once securely attached, sea lampreys rasp through the fish's scales and skin with their sharp tongue. (newsfulonline.com)
Cells2
t-SNE plot of surviving X1 and X2 cells (n = 1,039 after QC filter) after sub-lethal irradiation. (stowers.org)
Recurrence is mainly driven by minor subpopulations of drug-tolerant persister (DTP) cells that survive the cytotoxic drug effect. (bvsalud.org)
Mouth1
Watch a lamprey using its sucker mouth to climb a wall in this video . (sciencelearn.org.nz)
Back1
And then we'll condense over the extractor body, which has our whole body sea lamprey, and then it will go back down onto the sea lamprey. (newsfulonline.com)
Host1
Sea lampreys feed on the fish's body fluids by secreting an enzyme that prevents blood from clotting, similar to how a leech feeds off its host. (newsfulonline.com)
Long2
A lamprey is long and cylindrical, lacking paired fins or scales. (alaska.gov)
However, some Native peoples in Alaska have long relied on migrating lampreys as an important food source. (alaska.gov)