- Types:
- show 24 types...
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agnathan, jawless fish, jawless vertebrate
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
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placoderm
fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws
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fish
any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills
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bottom-dweller, bottom-feeder
a fish that lives and feeds on the bottom of a body of water
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bottom lurkers
a fish that lurks on the bottom of a body of water
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ostracoderm
extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic
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heterostracan
extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
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cephalaspid, osteostracan
extinct jawless fish of the Devonian with armored head
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anaspid
extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
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conodont
small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
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cyclostome
primitive aquatic vertebrate
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lamper eel, lamprey, lamprey eel
primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
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hag, hagfish, slime eels
eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
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cartilaginous fish, chondrichthian
fishes in which the skeleton may be calcified but not ossified
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fingerling
a young or small fish
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game fish, sport fish
any fish providing sport for the angler
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food fish
any fish used for food by human beings
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rough fish
any fish useless for food or sport or even as bait
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young fish
a fish that is young
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mouthbreeder
any of various fishes that carry their eggs and their young in their mouths
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spawner
a female fish at spawning time
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northern snakehead
a voracious freshwater fish that is native to northeastern China; can use fin to walk and can survive out of water for three days; a threat to American populations of fish
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bony fish
any fish of the class Osteichthyes
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A. testudineus, Anabas testudineus, climbing perch
a small perch of India whose gills are modified to allow it to breathe air; has spiny pectoral fins that enable it to travel on land
