1. Sperm whales

Sperm whales feed on large squid, fish, scales, etc. Male whales also feed on cuttlefish, but they usually prefer larger prey, such as squid with king sour sauce. Once in the stomach of a sperm whale, a 12-meter-long and 2-kilogram squid was found intact.

Sperm whales sometimes have scratches and circular sucker marks similar to scratches on their mouths and bodies. It is speculated that it may be the scars left by squid tentacles when fighting with such large prey. There have been records of sucker marks with a diameter of 11 cm.

2. Sea eels

Sea eels are widely distributed in eastern Africa, the Indian Ocean and the Pacific Northwest. They are fierce carnivorous fish, swim quickly, inhabit the sediment or sand mud bottom sea area with a water depth of 5-8 meters, and live in mud caves. They often go out for food in waves and heavy waters, and are more active in the evening and early morning. Like to eat shrimp, crab, fish, fish and squid.

3. Sharks

Sharks mostly feed on marine animals such as fish, live on injured marine mammals, reptiles and carrion, remove the weaker members of the animals, and also eat garbage and other wastes left on board. In addition, some sharks also hunt all kinds of marine mammals, fish and animals such as turtles and crabs. Some sharks can go without food for months, and the great white shark is one of them. It is reported that great white sharks only eat once every one or two months.

4. hawksbill hawksbill

hawksbill hawksbill is a marine animal of Reptilia, which is a large and fierce carnivore in the ocean. It often haunts coral reefs, mainly predators, shrimps, crabs and mollusks, and also eats seaweed. It has strong mobility and fast swimming speed, and likes to swim on coral reefs, continental shelves or covered with brown algae.