Sharks

These are sample about Shark Bite : Shark Bite Shark Bite

Picture of Sharks With close to 400 shark species floating around, you could fill volumes cataloguing their individual food habits. While cookiecutter sharks take nonlethal bites of flesh from their prey and call it a day, great white shark may eat large sea mammals in one big gulp. And certainly the dietary customs of the 8-inch (20-centimeter) dogfish shark vary from that of the 60-foot (20-meter) whale shark, not to mention the different cousins, aunts and uncles in between. All sharks are at least partly carnivorous. They usually consume between 0.5 and 3.0 percent of their body weight each meal since most space their dinners out to every two or three days. Although their bodies are well equipped for catching food, they can't chew well, so they need time to properly digest. Since sharks stand at the top of the aquatic food chain, their diets play an important role in regulating the species below them, much like lions in the jungle. For instance, if large sharks were to die out,...

Shark Anatomy 1.Liver 2.Spiral valve 3.Heart 4.Pancreas 5.Stomach 6.Eye 7.Nostril 8.Ampullae of Lorenzini 9.Teeth 10.Pectoral Fin 11.Pelvic Fin 12.Anal Fin 13.Caudal or Tail Fin 14.Second Dorsal Fin 15.First Dorsal Fin 16.Gills Skeleton The bones of a fish are made mostly of calcium, but a shark doesn't really have any bones. A shark skeleton is made of cartilage. Bony fish have a gas-filled swim bladder which enables them to float in the water, but sharks have no such bladder. Since cartilage is lighter than bone, it helps to keep a shark from just sinking to the bottom of the ocean. A shark doesn't have as many moveable parts as a bony fish, which in some ways makes a shark a little more clumsy. But cartilage is more flexible than bone, so a shark can turn around in a smaller space than a bony fish. Sharks keep growing cartilage as long as they live, and have extra mineral deposits in their jaws where they need extra strength, (the better to bite you with). Shape W...