In it swim billions of fish from over 25,000 species. These fish can be tiny or huge. They can be round, box-like, or long and slim. Some look like leaves, spines, or rocks. They can be any color of the rainbow, striped, spotted, or luminous.
Fish can have horns, beaks, or eyes that stick out.
Cowfish Fish ruled the ocean before dinosaurs ruled the land. While many have become extinct , others have not changed much at all. There are three goups of fish. The largest group of fish, bony fish, have skeletons. Cartiliganous fish, such as sharks, have cartilage rather than bones.