<P> Scoliodon has an elongated , spindle - shaped , body tapered at the ends , making it a very fast swimmer . The trunk and tail are laterally compressed , while the head region is dorsoventrally compressed . The entire body is covered by an exoskeleton of placoid scales . The mouth is located on the ventral side and is bound on both sides by jaws . It has two rows of homodont or polyphyodont teeth , which are homologous to the placoid scales covering the body.It is a marine fish . </P>
<P> Scoliodon has an elongated , spindle - shaped , body tapered at the ends , making it a very fast swimmer . The trunk and tail are laterally compressed , while the head region is dorsoventrally compressed . The entire body is covered by an exoskeleton of placoid scales . The mouth is located on the ventral side and is bound on both sides by jaws . It has two rows of homodont or polyphyodont teeth , which are homologous to the placoid scales covering the body.It is a marine fish . </P>
what type of scale is found in scoliodon
what type of scale is found in scoliodon
placoid
placoid