When a cuttlefish encounters a strong enemy, it will use "jet" as a method of escape and wait for an opportunity to leave, so it has names such as "squid" and "cuttlefish".

The real name of cuttlefish is Wuqi, also known as flower branch, cuttlefish or cuttlefish. It is an animal in the phylum Cephalopod, order Sepia, in the phylum Mollusca. There are small pigment sacs in its skin that change color and size with changes in "mood". Squids leap out of the sea and have amazing aerial capabilities. Like squid and octopus, they are marine molluscs, but none of them are fish.

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Squid, also known as cuttlefish and cuttlefish, is a marine cephalopod mollusk of the order Sepia, close to octopus and calamari. edge. Modern squid appeared in the Miocene 21 million years ago, and their ancestors were belemnites. It is characterized by a thick calcareous inner shell (squid bone, cuttlefish bone or jellyfish, which can be used as medicine).

The body of the squid can be divided into three parts: head, feet and trunk. The trunk is equivalent to the visceral mass, covered by a muscular mantle on the outside and with a calcareous inner shell.

The front end of the head body is spherical, with a mouth at the top, a mouth membrane around it, and five pairs of arms on the periphery. There is a pair of well-developed eyes on both sides of the head with complex structure. There is an oval-shaped fossa below the back of the eye, called the olfactory pit, which is the olfactory organ. It is equivalent to the olfactory organ of gastropods and is a chemoreceptor.

Baidu Encyclopedia-Squid