Pisces: general features and classification upto order.
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1) It includes skates And Rays. 2) The body is flattened dorso-ventrally. 3) Pectoral fins are enormously expanded anterio posteriorly and gill openings are ventral and five in number. 4) Dorsal fins, if present are seen on the tail.
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These are true, jawed vertebrates with specific organs for respiration, excretion and blood circulation. The organisms belonging to this class are poikilotherms, meaning that they cannot regulate their own body temperature. Essentially, all the fish come in this category.
Kingdom: Animalia
Phylum: Chordata
Class: Pisces
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