The real name of squid is Wu _, also known as cuttlefish, cuttlefish or cuttlefish. It is an animal of the order Cephalopoda, a mollusk. When the squid encounters a strong enemy, it will use "inkjet" as an escape method and wait for an opportunity to leave, so it has names such as "squid" and "cuttlefish".

There are pigment vesicles in the skin, which will change color and size with the change of "mood". Squid will jump out of the sea and have amazing air flight ability. Like squid and octopus, they belong to marine mollusks, and none of them belong to fish.

There are about 350 kinds of squid: cuttlefish, golden squid, cuttlefish, needleless squid, flame squid, fluorescent squid, king squid, spotted squid, fine squid, flying squid, etc., among which the smallest is young squid.

Sperm whale introduction:

Sperm whale (scientific name: Physeter macrocephalus): The head is huge, the lower jaw is small, and only the lower jaw has teeth. Mainly eating squid. With a body length of18m and a weight of over 50 tons, it is the largest toothed whale, with its head accounting for13 of its body and no dorsal fin. With strong diving ability, it is the deepest and longest diving mammal.

It is like a fish and breathes with its lungs. The neck is short, and the head seems to be connected with the trunk; Cervical vertebra healing; Nose is a blowhole, located at the snout, forelimbs become fins, forearms degenerate, palms become longer, and the number of toes increases, but toes and claws are not visible from the outside; Hindlimb degeneration; The tail is like a fish, with a horizontal tail fin, and it swings by the tail when swimming.

Sperm whales are distributed in a wide geographical range. It can be seen in almost all ocean areas from the equator to high latitudes, but it is usually found on continental slopes or deeper waters.

Like to live in groups, a few male whales and a large group of female whales and young whales often form a large group of dozens or even two or three hundred whales. Every year, they migrate north and south for reproduction and foraging, and their swimming speed is very fast, reaching more than ten nautical miles per hour. The staple food is large squid, octopus and fish, while squid and octopus mainly eat crustaceans and fish such as shrimp, crab and so on.

Distribution extends to many closed or partially closed sea areas, such as the Mediterranean Sea, the Sea of Okhotsk, the Gulf of California and the Gulf of Mexico. They are widely distributed in the world's ice-free waters, and they can be found in the ice-free waters from the equator to the poles.