The average lifespan of an octopus is only about three years, and if the living conditions are very ideal and they are not caught, they can live up to about four years.

The average life span of an octopus is only about 3 years, if the living conditions are very ideal and not caught, it can live up to about 4 years old. Octopus for temperate mollusks, living underwater, adapted to the water temperature can not be lower than 7 ℃, seawater specific gravity of 1.021 is most suitable, low salinity environment will die.

The octopus has eight feet. Octopus body is short ovoid, sac-like, no fins, head and body demarcation is not obvious, the head has a large compound eye and 8 can be contracted wrist, each wrist has two rows of fleshy suction cups, and between the wrist has a membrane connected to the wrist of varying lengths, the wrist has 2 rows of sessile suction cups, so called "eight wrist class".

Extended information:

The octopus is carnivorous, feeding on gills and crustaceans (shrimp, crabs, etc.), and some species eat plankton. It is not a question of whether it likes, because the stable structure of myoglobin is the octopus in the deep sea survival of the necessary conditions, it and the lobster to fight you to death, is to compete for astaxanthin resources, astaxanthin is the strongest antioxidant, is to ensure that the structure of myoglobin is stable and not oxidized necessary conditions.

Octopus surface distribution of a kind of cells, called pigment cells. Each pigment cell contains one of four natural pigments: yellow pigment, red pigment, brown pigment, or black pigment. These pigments can only be seen when the pigment cells are contracted. An octopus can change its color by contracting only one pigment cell at a time.