The cuttlefish, also known as squid, fish, because of its lack of vertebrae, although called fish, in fact, it is a mollusk living in the ocean. Cuttlefish is not only delicious and nutritious, but also the whole body can be used as medicine. The inner shell of cuttlefish is called cuttlebone and squid bone in Chinese medicine. Cuttlebone plays an important role in Chinese medicine. In the Compendium of Materia Medica, it is written that cuttlebone is "the cure for all blood diseases". Cuttlebone has the effects of astringency, stopping bleeding, acid control, pain relief, cuttlebone is the main medicine for treating stomach diseases. Traditional Chinese medicines for stomach diseases, which are prepared with cuttlebone, have shown remarkable efficacy in the treatment of stomach diseases. Cuttlebone is a good medicine for treating all kinds of bleeding. There are many good prescriptions for treating bleeding with cuttlebone in China. To treat gastric bleeding, you can use cuttlebone with hyacinth*** to grind fine powder and take it internally; to treat coughing blood from tuberculosis, you can decoct cuttlebone, cactus and cedarwood and take it. For bleeding caused by trauma, cuttlebone, bone powder, and Pohuang carbon can be ground in equal parts and sprinkled on the wound for treatment. Cuttlebone can also be used to stop bleeding from tooth extraction and nasal surgery. The enlarged part at the end of the rectum of cuttlefish is called the ink sac, which is a container for the cuttlefish to release ink to its strong enemies when it encounters danger. The main ingredient of cuttlefish ink is squid ink melanin, which is a systemic hemostatic drug that can be used in the treatment of gastrointestinal bleeding, functional uterine bleeding and pulmonary coughing. In addition, pharmacological studies have found that cuttlefish ink has a preventive effect on acute radiation sickness. Cuttlefish bone can be prepared in a certain way to obtain a complex, which has a certain anticancer effect. In addition, antiviral substances can be extracted from cuttlefish. Cuttlefish meat can be boiled to cure women's blood deficiency and menorrhagia. Cuttlefish eggs can stimulate the appetite and improve water circulation. The whole body of cuttlefish is medicine.

Octopus, also known as octopus (English name octopus), the same marine mollusks.

Octopoda (Octopus) cephalopod mollusks. However, strictly speaking, it refers only to the octopus genus (Octopus) animals, widely distributed in shallow water.

The size of octopuses varies greatly. The smallest octopus is the arborescent octopus (O. arborescens), which is about 5 centimeters (2 inches) long, while the largest species can be up to 5.4 meters (18 feet) long, with a carapace spread of up to 9 meters (30 feet). The body of a typical octopus is sac-like; the head is not clearly separated from the carapace, and is surmounted by large compound eyes and eight retractable wrists. Each wrist has two rows of fleshy suckers that provide a strong grip. The base of the carapace is connected to webbed tissue called the skirt, which has a mouth at its center. The mouth has a pair of sharp, horny palates and a file-like toothed tongue, which is used to bore through shells and scrape their flesh.

The octopus draws water into its coat membrane, breathes it in, and then expels it through a short funnel-shaped body tube. Most octopuses crawl along the seabed on suction cups, but when startled, they eject a stream of water from their body tubes and move quickly in the opposite direction. When in danger, they emit an ink-like substance that serves as a smoke screen. Some species produce a substance that can paralyze an attacker's sense organs.

The most familiar octopus is the common octopus (O. vulgaris), medium-sized, widely distributed in tropical and temperate seas around the world, inhabiting the rocky seabed in caves or crevices, preferring to stay hidden. It mainly feeds on crabs and other crustaceans. This species is considered to be the highest invertebrate intelligence, and has a highly developed pigment-containing cells, so it can change its body color very quickly, and the rapidity of the change is also surprising.

Octopus dioecious. The male has a specialization of the wrist, known as the stem wrist or handing wrist, used to put the sperm packet directly into the female body of the coat cavity. The common octopus mates in winter. Eggs are about 0.3 centimeters (1/8 inch) long, totaling more than 100,000, and are laid under rocks or in caves. Juveniles hatch after 4, 6, or 58 weeks, and during incubation the female guards the eggs, cleaning them with a suction cup and stirring them with water. The juvenile octopus is small and similar in shape to the adult, and after hatching, it drifts along with the plankton for a few weeks before sinking to the bottom and hiding.

The octopus feeds mainly on shrimp and crabs, but some species eat plankton. Many marine fish feed on octopus. In the Mediterranean region, Eastern countries and some other parts of the world, people have long regarded octopus as a delicacy.

Octopoda (Octopoda) cephalopod mollusks of the common name. But strictly speaking only refers to the octopus genus (Octopus) animals, widely distributed in shallow water.