Book Creator

Fish Quality Control

by Rita Costa

Pages 4 and 5 of 198

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1 - FISH
Fishery products can be grouped into fish, molluscs and crustaceans.

Fish - are animals that belong to the vertebrate class and breathe through gills that allow them to absorb oxygen present in water and, in some cases, atmospheric oxygen. The gills communicate with the outside through chambers and crevices in the case of cyclostomes and elasmobranchs. In the case of teleostome fish, the branchial cavities are protected by operculum.
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Cyclostome fish have a cartilaginous skeleton and bare skin. They have no jaws and seven gill chambers are opened on each side of the head. Examples: sea lamprey and river lamprey.
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Lamprey
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Elasmobranch fish have a cartilaginous skeleton and placoid scales. They have five gill slits on each side of the head and an asymmetric caudal fin. Examples: sharks, tope, ray, flake, purple-legged.
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Ray
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Purple-legged
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Flake
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