Great white shark. Sharks are the overlord of the ocean, located at the top of the marine food chain, and have no natural enemies. Sharks' teeth are as sharp as steel knives, which can crush turtle shells. Sharks are carnivorous fish and can eat swordfish. Therefore, great white sharks are more powerful than swordfish. Great white sharks move from the surface to the continental slope at the depth of 1280 meters. Lively and good at swimming, the average cruising speed is 3.2 kilometers per hour.