Problem description:

What's the difference between squid, cuttlefish and squid?

Analysis:

The essential difference is that squid is a shellfish and octopus (also called squid) is a mollusk.

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Squid living in the sea of Wang Yang is commonly known as cuttlefish, but it is not a fish, but a real shellfish. It is a close relative of oysters and mussels. The difference between squid and general shellfish is that the shell of general shellfish grows on the outside of the body to form an exoskeleton, while the shell of squid has evolved into an inner shell and formed an endoskeleton in the long-term evolution. The endoskeleton of squid is porous, which can store air and increase buoyancy. Like a fish with a swim bladder, it can swim freely in the vast ocean like a fish. Squid has a strong swimming ability, can migrate long distances, and overwinters in deep water in autumn and winter. Squid water spraying can make rapid progress and is an excellent swimmer. When they move at maximum speed, they can hardly see their movements, so they are called rockets in the ocean.

Because the squid has an ink sac in its stomach, when it is in danger, it will spray ink to darken the nearby sea water to confuse its opponents, so that the invading enemy has to sigh at the ink and take the opportunity to escape or seize the opportunity to prey on its victims, so people also call the squid cuttlefish.

Octopus is a mollusk with eight long legs like streamers on its head and wrist, also known as octopus. Octopus's feet are very important in our daily life. There are about 300 suction cups on each of the eight sensitive wrists, and the pulling force of each suction cup is 100g. Once a little creature is sucked in, it can't escape at all. Octopus's feet have a division of labor. When sleeping, it hides its soft body in a crack in the stone, leaving two tentacles on duty and constantly walking, while the other tentacles curl up and fall asleep to move them.

Once the octopus's foot is caught by its opponent, it will automatically break, still losing one or two feet, and quickly run away to save his life. Whenever I go to wrist fracture, the blood vessels in the wound will contract as much as possible, the wound will heal quickly, the wound will not bleed, it will grow well the next day, and a new wrist will soon grow. Octopus has amazing ability to change color. It can change its skin color at any time to coordinate with its surroundings. Octopus is white when it is afraid, reddish brown when it is angry, and sometimes it turns brown or has spots all over its body, usually brown and purple. . Octopus is aggressive, bullying the weak and fearing the hard. When it meets its owner, it will use the tactics of losing soldiers and protecting cars. When it meets the weak, it will beat the opponent with its unique skills. Whenever he meets an opponent, the clever octopus begins to use the first tactic-changing color, turning red for a while, turning green for a while, flickering and dazzling, making the opponent exhausted; Then use the second tactic-put tentacles around the enemy, then spray smoke bombs to paralyze the opponent, make him dizzy and be fixed by * * *, and then put it in the mouth to enjoy this delicious trophy alone. Octopus has a clear love and hate. Although fierce, it takes care of its children and is willing to die. Every breeding season, the female octopus lays a string of crystal-clear and full eggs like a grape string and never leaves. From time to time, she turns the shiny eggs by hand, spouts water from the funnel and washes them one by one. Until the little octopus was born, she still refused to leave, tired and haggard, and some died of overwork. Octopus is cruel and scheming, and people who go into the sea are not without danger. The only way to deal with it is to quickly cut off the slightly higher nerve between its eyes and let it do nothing.

There are differences among squid, cuttlefish and octopus.

All three animals belong to the class Cephalopoda.

Squid, also known as soft fish and squid.

Cuttlefish, also known as squid and cuttlefish, belong to the same order as squid.

Squid meat is more delicious than cuttlefish. The head and trunk are longer and narrower than cuttlefish, especially the end of the trunk is very similar to the spear head of javelin, so it is called squid.

Octopus, also called octopus, belongs to a kind of octopus.

Both octopus and cuttlefish have ink sacs, which can release ink. The biggest difference is that the octopus has only eight wrists, and the sucker on the wrist has no handle and toothed ring.