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Sharks differ from most other kinds of fish in a number of ways.A. Sharks have no bones.B. Their skeleton is made of a tough, elastic substance called cartilage.Most species of sharks have a rounded body shape somewhat like a torpedo. This stream-like shape aids in swimming.Angel sharks and a few other species that live near the ocean bottom have a flat body similar to that of skates and rays.The body of a newborn shark resembles that of an adults in almost every way except size. Sharks have fewer young than most fish do at one time. Some species gave birth to 60 or more pups in a litter, but most have far fewer. The parents do not take care of the young and may even eat them. |
