Amazing Facts About Sharks
Sharks are a group of elasmobranch fish characterized by a
cartilaginous skeleton, five to seven-gill slits on the sides of the head,
and pectoral fins that are not fused to the head.
Sharks are a group of elasmobranch fish characterized by a
cartilaginous skeleton, five to seven-gill slits on the sides of the head,
and pectoral fins that are not fused to the head.