Triakidae

shark family

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In chondrichthyan: Annotated classification
Family Triakidae (smooth dogfishes)The principal distinguishing feature is small, closely crowded teeth in series, rounded or somewhat compressed and with 3 or 4 cusps. True nictitating membrane lacking in eye. Development ovoviviparous or viviparous. Although sharks of this family are generally considered harmless, there is…
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