The difference between octopus and squid

Octopus and squid are animals that live in the sea. Many people are not very clear about the difference between them, and some people even mistake octopus for squid. So what is the difference between them? How do you distinguish these two marine creatures? Today, let me take you to see the difference between octopus and squid.

The difference between octopus and squid is that octopus is a mollusk with eight long ribbon-like legs on its head - arms, so it is also called "octagonal fish". The octopus's feet are extremely important in life. It has eight sensitive tentacles, each with more than 300 suction cups. Each suction cup has a pulling force of 100 grams. Once a small creature is sucked, it cannot escape. The octopus's feet also have a division of labor. When it sleeps, it hides its soft body in the cracks of the stone, leaving two tentacles on duty, constantly moving around, while the other tentacles curl up. It will take a lot of effort to wake up these sleeping tentacles by moving them, and it may be a waste of effort. But once it touches the guarding tentacle, it will immediately jump up and release ink to hide itself.

The squid that lives in the ocean is commonly known as cuttlefish, but it is not a fish, but a real shellfish, a close relative of oysters and mussels. The difference between squid and general shellfish is that the shells of general shellfish grow on the outside of the body to form an exoskeleton, while the shells of squid have evolved into internal shells and formed an internal skeleton during long-term evolution. The squid's endoskeleton is loose and porous, which can store air to increase buoyancy, just like a fish has a swim bladder, so it can swim freely in the vast ocean like a fish. Squids are strong swimmers and can migrate long distances, hibernating in deep water in autumn and winter. Squids can spray water to move forward quickly and are excellent swimmers. When they are moving at their fastest speed, their movements are almost invisible, so they are called rockets of the ocean. Because there is an ink sac in the squid's abdomen, when it encounters danger, it sprays ink to dye the nearby sea water black to confuse its opponent, leaving the invading enemy helplessly looking at the ink. People then take the opportunity to escape or hunt for prey, so people also call squid cuttlefish.

The difference between octopus and squid, if you just look at the text, you still won’t be able to tell them apart. Therefore, the editor recommends that you must see these two marine creatures in person and understand their real differences, so that you will not make some common sense mistakes in life and can also learn more relevant knowledge in life.