Squid, whose real name is black horseshoe crab, also known as cuttlefish, cuttlefish or cuttlefish, belongs to 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. Octopus is a temperate mollusk, which lives underwater and adapts to the water temperature of not less than 7 degrees Celsius. It can feed on macrozooplankton and grow, and is widely distributed in tropical and temperate waters of the world's oceans.

Characteristics of squid

Squid, also known as cuttlefish and cuttlefish, is a marine cephalopod mollusk of the order Squid, which is closely related to octopus and cuttlefish. Modern squid appeared in the Miocene 2100000 years ago, and its ancestors were archers, characterized by calcareous inner shells. The body of squid can be divided into three parts: head, feet and trunk. The trunk is equivalent to the visceral mass, which is covered with muscular membrane and has a calcareous inner shell.

The front end of the cephalic body is spherical, with the mouth at the top, the oral membrane around it and five pairs of wrists around it. There are a pair of developed eyes on both sides of the head, and the structure is complex. Wrist and wrist-touching are the predation and combat weapons of squid. Not only the weak life will be killed under the wrist of squid, but even the giant whale in the sea will be difficult to deal with when it meets the big squid with a length of more than ten meters.

The above content reference: Baidu Encyclopedia-Squid