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KEY CHARACTER USED TO IDENTIFY RAYS
Gill openings ventral – six gill opening. Anterior edge of the greatly enlarged. Pectoral fin attached to side of the head, anterior to the gill openings. Anal fin absent. Eyes and spiracles on dorsal surface. Nictitating membrane absent. Cornea attached directly to skin around the eyes. Body strongly depressed. Jaws protrusible in most of the case. Teeth pavement like. Spiracle large and close to eyes . Water for breathing is chiefly taken through the spiracle Most species with one or more Poisonous spines on tail Skeleton composed of cartilage Males with a pair of claspers along side pelvic fins |
Last modified: Monday, 23 January 2012, 11:08 AM