Octopus and octopus are a kind of fish, octopus is the collective name of octopus, because octopus all have eight long band-like claws, so also called octopus.

Octopus, invertebrates, mollusks, cephalopods, octopus family (octopus family), or octopus (shāo). The body is short ovoid, without fins. There are eight wrists on the head, so it is also known as "octopus" or "octopus". The body is ovoid or oval, with strong muscles, a narrow opening of the outer coat cavity, and generally no pores on the body surface. Carapace sucker 1 or 2 rows.

Octopus is a temperate mollusk, living underwater, adapt to the water temperature can not be lower than 7 ℃, the specific gravity of seawater 1.021 is the most suitable, low salinity environment will die. Can ingest large animal plankton and growth. Widely distributed in the world's oceans of tropical and temperate waters. In the fall and winter, it often burrows in the mud and sand of deeper waters. Normally crawl with the wrist, sometimes by the membrane between the wrist to stretch to swim, or use the lower part of the head of the funnel spray water for rapid retreat.

Octopus surface distribution of a kind of cells, called pigment cells. These pigments can only be seen when the pigment cells are contracted. The octopus can change its color by contracting only one pigment cell at a time. When an enemy looms, the octopus changes to a dark pink color, releases a cloud of black ink from its ink sac, and then fades in color and quickly flees.

Extended Information:

Octopus is rich in protein, fat, carbohydrates, calcium, phosphorus, iron, zinc, selenium, and vitamins E, B, and C, among other nutrients. Octopus is rich in oxalic acid, can regulate blood pressure, applicable to hypertension, low gallery pressure, arteriosclerosis, cerebral thrombosis, pain gangrene and swelling and other diseases.

Octopus is flat and sweet, non-toxic, can be used in medicine, has a tonic blood, astringent role, is the role of female postpartum deficiency, lactation, lactation tonic good. Octopus has the effect of enhancing men's sexual function, because octopus arginine content is high, and arginine is a necessary component of sperm formation.

Reference:

Baidu Encyclopedia_Octopus

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