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Unformatted text preview: central core of bones that form fully articulated joint with one another b. Bony rays are present only at the tips of each lobed fin c. Muscles within each lobe can move the fin rays independently of one another (to the envy of bony fishes) d. Intermediate step: love-fined fishes (such as coelacanth, lungfish) e. Amphibians almost certainly evolved form the lobe-finned fishes. D. Chondrichthyes (Sharks, skates, rays) 1. Skeleton made of fortified cartilage (light and strong) 2. No gill cover 3. Reproduction: internal fertilization (usually, baby sharks are born alive) E. Myxini (Hagfishes) F. Cephalaspidomorphi (Lampreys) III. Bony fishes A. Skeleton made of bone (strong but heavy) B. Solution-Swim Bladder C. Have gill cover D. Reproduction: usually External Fertilization...
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- Spring '08