Cuttlefish is called cuttlefish. It is a shellfish mollusk. There is an ink sac in the belly of cuttlefish, which is full of ink, so it is commonly known as cuttlefish. The ink in the belly of cuttlefish is a weapon to protect itself. Usually, it roams in the sea and specializes in eat small fish shrimp, but once there is any fierce enemy coming at it, the squid immediately releases ink from the ink sac, blackening the surrounding sea water, and then they take the opportunity to escape. The ink of octopus and squid contains toxins, which can be used to paralyze enemies. Octopus and squid use ink in dangerous situations to protect themselves. Their bodies can make ink and store it in a circular capsule under their bodies.
Cuttlefish are shellfish, also known as cuttlefish, cuttlefish, mullet and so on. It belongs to the phylum Mollusca, Cephalopoda, Decapoda, sepiidae. China refers to "cuttlefish" or "cuttlefish", which are mostly two species: Sepiella maindroni and Sepiella maindroni, which are mainly produced in the East China Sea of China.
There is little difference in appearance between the two. The main difference is: the former has an oval body, a little thin and no spicule, and its dried product is called a borer; The latter has spicules, and the dried product is called dried squid. 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 the names of "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. Cuttlefish shell, a cuttlefish plate, whose scientific name is cuttlefish bone, is also a commonly used medicinal material in traditional Chinese medicine, called cuttlebone, which is a commonly used Chinese medicine for blindly making acid, stopping bleeding and astringing.