A double-walled capsule found in jellyfish and other CNIDARIA whose functions include prey capture, defense, locomotion, and attachment. Nematocysts contain toxic CNIDARIAN VENOMS which are injected into the victim via a barbed tubule.

A phylum of radially symmetrical invertebrates characterized by possession of stinging cells called nematocysts. It includes the classes ANTHOZOA; CUBOZOA; HYDROZOA, and SCYPHOZOA. Members carry CNIDARIAN VENOMS.

A genus of freshwater polyps in the family Hydridae, order Hydroida, class HYDROZOA. They are of special interest because of their complex organization and because their adult organization corresponds roughly to the gastrula of higher animals.

The order Actiniaria, in the class ANTHOZOA, comprised of large, solitary polyps. All species are carnivorous.

##### Not a valid request: I'm sorry for any confusion, but "Maine" is a state in the northeastern United States and not a medical term or condition with a specific definition in the healthcare context.

Venoms from jellyfish; CORALS; SEA ANEMONES; etc. They contain hemo-, cardio-, dermo- , and neuro-toxic substances and probably ENZYMES. They include palytoxin, sarcophine, and anthopleurine.

Organs and other anatomical structures of non-human vertebrate and invertebrate animals.

"Bites and stings refer to tissue damage or toxic reactions caused by the teeth, mouthparts, or venomous secretions of animals such as insects, spiders, snakes, and mammals during predatory or defensive attacks."

I'm sorry for any confusion, but "New Hampshire" is a geographical location and not a medical term or concept, so it doesn't have a medical definition. It is a state in the northeastern United States, known for its scenic beauty and the White Mountains. If you have any questions related to health, medicine, or healthcare services in the state of New Hampshire, I would be happy to help with those!

A class in the phylum CNIDARIA which alternates between polyp and medusa forms during their life cycle. There are over 2700 species in five orders.

The class of true jellyfish, in the phylum CNIDARIA. They are mostly free-swimming marine organisms that go through five stages in their life cycle and exhibit two body forms: polyp and medusa.

A class in the phylum MOLLUSCA comprised of SNAILS and slugs. The former have coiled external shells and the latter usually lack shells.

Instinctual behavior pattern in which food is obtained by killing and consuming other species.

A peptide that is a homopolymer of glutamic acid.

I'm sorry for any confusion, but the term "Pacific Ocean" is a geographical term referring to the largest ocean in the world, covering an area of about 63,800,000 square miles (165,200,000 square kilometers), and it is not a medical term.