How do the number and shape of fins of a bony fish differ from those of shark?

Answer 1

Bony fish typically have a greater number of fins than sharks, including paired pectoral and pelvic fins, a dorsal fin, and an anal fin, which are often more flexible and can be variously shaped. In contrast, sharks possess fewer fins, primarily including a larger dorsal fin, paired pectoral fins, and a caudal fin, which are more rigid and often triangular or crescent-shaped. The fins of bony fish are generally supported by bony rays, while shark fins are made of cartilage. This structural difference contributes to the varying swimming techniques and adaptations of each group.