AP BIOLOGY

Detailed explanation-1: -They have fleshy, lobed, paired fins, which are joined to the body by a series of bones. The fins of lobe-finned fish differ from those of all other fish in that each is borne on a fleshy, lobe-like, scaly stalk extending from the body. Pectoral and pelvic fins have articulations resembling those of tetrapod limbs.

Detailed explanation-2: -Like human limbs, fins provide fish with balance, steering, and protection. Fins are either single along the centerline of the fish: the dorsal fin, anal fin, and tail fin; or paired fins: the pectoral fins and ventral fins. i Pectoral fins help fish balance.

Detailed explanation-3: -Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping.