Belongs to the animal kingdom Mollusca Cephalopods Cephalopods Octopoda Octopoda Unrequited suborder Octopidae (octopus family) Octopus (octopus genus)
The world's octopus species of about 650 species, their sizes vary greatly. The body of the octopus is short ovoid, saccate, and finless; the head and carapace are not clearly demarcated, and the head carapace of the octopus is about 7 to 9.5 centimeters, with large compound eyes and eight contractible carapaces on the head. Each carpus has two rows of fleshy suckers, the carpus of short octopus is about 12 centimeters long, the carpus of long octopus is about 48.5 centimeters long, and the carpus of true octopus is about 32.5 centimeters long. Normally, it crawls with the wrist, sometimes swims by stretching the membrane between the wrists, can hold other things strongly, and uses the funnel at the lower part of the head to spray water for rapid retreat. The base of the carpus is connected to a webbed tissue called the skirt, which has a mouth at its center. The mouth has a pair of sharp, horny palates and file-like teeth and tongue, which are used to drill through shells and scrape their flesh. The best known octopus is the common octopus (O. vulgaris), a medium-sized octopus widely distributed in tropical and temperate seas around the world, inhabiting caves or crevices on rocky seabeds and preferring to remain hidden. This species is considered to have the highest intelligence among invertebrates, and has highly developed pigment-containing cells that can change body color very rapidly.
The smallest octopus is the arborescent octopus (O. arborescens), which is about 5 centimeters (2 inches) long, while the largest can be up to 5.4 meters (18 feet) long, with a carpal tunnel of up to 9 meters (30 feet). The arborescent octopus is very strong, a sucker on the carpal hand about 2.5 mm in diameter can suck up objects weighing 48 grams, and octopuses 1.5-2 meters long have a sucker diameter of about 6 mm and a suction force of more than 100 grams. They are often able to drag pick more than their own weight 5 times, 10 times, or even 20 times the weight of large stones.
The octopus can not only six times in a row to the outward spray of ink, but also like the most flexible chameleon, change their own color and structure, become as a piece of rock covered with algae, and then suddenly pounced on the prey, and the prey did not have time to realize what happened. The octopus can use its flexible carpals to crawl among reefs, rock crevices and the seabed, sometimes disguising itself as a bunch of coral, and sometimes as a pile of glittering gravel. Mark Norman of the University of Melbourne, Australia, discovered an octopus in 1998 in the estuarine waters off the Indonesian island of Sulawesi that could quickly mimic venomous creatures such as sea snakes, lionfish and jellyfish to avoid attack.
Carnivorous, it feeds on valvular gills and crustaceans (shrimp, crabs, etc.), and some species eat plankton. It is not a matter of whether it likes it or not, because the stable structure of myoglobin is the octopus in the deep sea survival of the necessary conditions, it and the lobster fight to the death, it is in order to compete for astaxanthin (known as astaxanthin in English, referred to as ASTA) resources, astaxanthin is the strongest antioxidant, is to ensure that the structure of myoglobin is stable and not oxidized necessary conditions. According to Professor Francesco Buda, a scientist at Leiden University in the Netherlands, and members of his experimental team in 2008, the reason for the attractive bright red color of cooked shrimp, crab, salmon and other representative fish was found through precise quantum computation to be due to the fact that shrimp, crab and salmon are rich in astaxanthin, and the natural red color of cooked shrimp, crab and salmon is the result of the red color of cooked shrimp, crab and salmon, and other representative fish. The natural red color of cooked shrimp, crab, salmon and other fish is astaxanthin.
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