hagfish


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hagfish,

primitive, jawless marine fish of the family Myxinidae, of worldwide distribution in cold and temperate waters. Its rudimentary skeleton, of cartilage rather than bone, has a braincase, but no jaw. The circular sucking mouth has rows of horny teeth. There is a single median nostril and the eyes are poorly developed. Like the other jawless fishes, the lampreyslamprey,
name for several primitive marine and freshwater jawless fishes of the order Petromyzontiformes. As in the other jawless fish, the hagfish, the adult lamprey retains the notochord, the supporting structure that in higher vertebrates is found only in the embryo.
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, hagfish retain the notochordnotochord
, in biology, supporting rod running most of the length of animals of the phylum Chordata and present at varying times in the life cycle. Composed of large cells packed within a firm connective tissue sheath, the notochord lies between the neural tube (spinal cord) and
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, a supporting structure found in higher vertebrates only in the embryo, throughout life. They lack a sympathetic nervous system, a spleen, and scales. Hagfish, or hags, spend much time embedded in muddy bottoms. They are chiefly scavengers, but also parasitize slow-moving fishes, eating their way into the victim's body and leaving only the skin and skeleton. Also known as slime eels, hagfish have glands on either side of their bodies that produce enormous quantities of mucoid material, probably as a defense mechanism. The sexes are separate, although an individual may have rudimentary organs of the opposite sex. Spawning occurs throughout the year; no larval stage is known. The Atlantic hagfish, Myxine glutinosa, may reach a length of 30 in. (76 cm). The Pacific hagfish, Eptatretus stouti, has been extensively used in physiological studies. The hagfish is classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Myxini, order Myxiniformes, family Myxinidae.

hagfish

[′hag‚fish]
(vertebrate zoology)
The common name for the jawless fishes composing the order Myxinoidea.
References in periodicals archive ?
Three species of hogfish occur in the Gulf of Mexico: The commonly named hogfish (Lachnolaimus maximus) and the smaller Spanish hogfish (Bodianus rufus) and spotfin hagfish (Bodianus pulchellus).
There are two sentences from your description of the hagfish that I wanted to ask about: "Hagfishes have, however, discovered another, easier way to gain access to their victims'tasty, tender insides.
Hagfish skin isn't useful just for fashion designers.
They began mining the Internet which lead them to contact Douglas Dodge, a University of Guelph professor, considered a leading hagfish expert, who is studying the properties of the slime fibres as a textile to make strong, resilient clothing.
The "Slimer," commonly known as the Pacific Hagfish (Eptatretus stoutii), uses its slippery body to slither into dead fish for its meals and may suffocate predators by releasing a batch of slimy goop.
The thin, eel-like creature known as a hagfish undoubtedly looks like an easy meal to a passing shark, but as soon as the larger animal's jaws clamp down, its mouth is suddenly filled with a tough, bulky slime that clogs its throat and gills.
Synthetic fabrics such as nylon are derived from petroleum, notes Fudge, so studying hagfish threads may lead to renewable "green" materials for making all sorts of things.
However, all the hagfishes that could be identified were Pacific Hagfish (Eptatretus stoutii).
Washington, November 29( ANI ):In the future, people may be wearing clothes made from hagfish slime.
Review of Some California Fisheries for 2007: Coastal Pelagic Finfish, Market Squid, Dungeness Crab, California Spiny Lobster, Highly Migratory Species, Ocean Salmon, Groundfish, California Halibut, Hagfish, Pacific Herring, and Recreational.
Following an introductory overview of the evolution, classification, and features of fishes, and a section describing 76 families, well-illustrated species accounts describe the biology, ecology, and behavior of 937 species from Atlantic hagfish to semi-tropical sharks.
Scavengers such as sleeper sharks, eel-like hagfish, and other bony fish come to the scene--drawn by sensitive sensory organs, which detected the whale as it descended.