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KEY CHARACTER USED TO IDENTIFY SHARKS
Five to seven separate gill openings on each side Dorsal fins are rigid Dermal placoid scales often present palatoquadrate (upper jaw) not fused to the cranium Teeth Numerous Some rib present Spiracle opening is present Tail heterocercal. Skeleton composed of cartilage. Single nostril is present on either side. Males with a pair of claspers along ride pelvic fins. |
Last modified: Monday, 23 January 2012, 11:11 AM