isocercal tail
isocercal tail In fish, a tail in which there is an apparent symmetry between the dorsal and ventral regions, the fin rays being supported by equal-sized arches of the penultimate vertebrae as well as by the reduced, plate-like, ultimate vertebra. it is found e.g. in cod.
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heterocercal tail
heterocercal tail In fish, a tail in which the tip of the vertebral column turns upward, extending into the do… Shellfish , shellfish A wide range of marine molluscs (abalone, clams, cockles, mussels, scallops, oysters, whelks, winkles) and crustacea (members of the zoolog… Actinopterygians , Holostei Group of marine and fresh water bony fish including many fossil species, e.g. Lepidotes (Triassic—Cretaceous), and Dapedius (Jurassic). Holo… cleaner fish , cleaner fish Fish (e.g. the cleaner wrasse Labroides dimidiatus) that remove ectoparasites (see PARASITISM) from other fish (which usually are much l… Silversides , Atheriniformes (class Osteichthyes, subclass Actinopterygii) An order of bony fish that includes fairly large marine individuals (e.g. the flying fis… Fin , fin / fin/ • n. a flattened appendage on various parts of the body of many aquatic vertebrates and some invertebrates, including fish and cetaceans,…
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isocercal tail