Question

Mention the names of paired fins in Scoliodon.

Answer 1

It is bounded by upper and lower jaws; each is beset with one or two rows of sharply pointed and backwardly directed teeth (Fig. 1.28B) to catch the slippery prey. The teeth are replaced if these are broken. The teeth of Scliodon are modified scales. The scales cover its body and extend inside the jaws to serve as teeth (Fig. 1.28C). The transition of the pla­coid scales into teeth is amply recorded in the jaw regions.