Sharks: A Children Photos Book About Sharks With Fun Sharks Facts and Pictures For Kids Sharks are big fishes that have no bones, but their skeleton contains cartilage which is softer than bones like the ones found in our ears. They breathe underwater using their gills that work like our nose. Sharks have many teeth. One of their teeth may eventually fall off after several days but it will be replaced by a new tooth. The skin of a shark is made up of many sharp scales that work like a skeleton outside their body. They use their scales to move quickly underwater. There are many types of sharks and some of them are big, while others are small.
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