The world's largest octopus
Octopus is also called doing? Octopus? , is a marine mollusk. The largest octopus in the world is an ordinary Pacific octopus.1In February, 973, a diver caught a big octopus in the Xiahud Canal in Washington. The diameter of this octopus's brachiopod was 15.6 meters and it weighed 53.6 kilograms. In addition, someone once found a pile of marine animal remains weighing about 7 tons on the seashore of St. Augustine, Florida, USA. After inspection by the National Museum of the United States, it was determined that the pile of remains was the remains of a large octopus, and it was estimated that the brachiopod could reach 6 1 meter.
Octopus is widely distributed in tropical and temperate waters all over the world, living in caves or crevices on the rocky seabed, and likes to hide. It mainly feeds on shrimps, crabs and other crustaceans. Octopus is considered to be the most intelligent among invertebrates. They have highly developed cells containing pigments, so they can change their body color very quickly, which is amazing. Octopus spreads its tentacles like a parachute and swims on the seabed of the Hawaiian Sea. It feeds on shrimp and crabs. The nest is often full of discarded debris. The white octopus can grow to 1 meter long, but it is the world's largest octopus-Pacific octopus. When its tentacles are fully opened, it can reach 8 meters long and weigh up to 250 kilograms. Of course, an article about the world's largest octopus was introduced earlier. If you are interested, you can learn about it. They are distributed in the north Pacific coast where the water depth reaches 65 meters, and they can also go to shallow or deep water to live.
Because individuals weighing 7 1 kg have been found, they are the largest octopus. The Pacific giant octopus is very big in the waters of different temperatures all over the Pacific Ocean, weighing about 15 kg, and its arms can reach 4.3 meters. Giant octopus head is big and round, usually reddish brown. They achieve the purpose of changing and changing colors through unique pigment cells, and even can be skillfully mixed with corals, plants and rocks with complex patterns. They are distributed in waters of different temperatures in the Pacific Ocean, from Southern California to Alaska, from the western Aleutian Islands to Japan. Giant octopus preys at night, mainly including shrimp, clams, lobsters and fish. They even attack and devour sharks and birds. The giant octopus in the North Pacific relies heavily on its highly developed senses. Its tentacles cover as many as 280 suckers, and each sucker contains thousands of chemoreceptors, which makes it have a keen sense of touch and taste. Because of its huge size, the giant octopus in the North Pacific has a short life expectancy and will only live to 3-5 years old in the wild.
Because of their short life span, their reproductive ability is very strong. They can lay up to100000 eggs, and the female octopus will give her life to protect the eggs. The size of a young is just like a grain of rice, and only a very small amount can survive to adulthood. During the breeding period, the male octopus will excrete seminal vesicles as long as 1 m. This giant Pacific octopus is bigger and longer than any other octopus. The record is kept by a specimen, with a circumference of 9. 1 m and a weight of 272 kg. Usually this kind of octopus is only more than 5 meters in circumference and weighs 50 kilograms. Their life span is about 4 years, and both females and males will die shortly after laying eggs. Female octopuses concentrate on taking care of their eggs, don't eat for months, and usually die soon after. Giant octopus head is big and round, usually reddish brown. They achieve the purpose of changing color through unique pigment cells, and even can be skillfully mixed with corals, plants and rocks with complex patterns.
Giant octopus preys at night, mainly including shrimp, clams, lobsters and fish. They even attack and devour sharks and birds. They are distributed in waters of different temperatures in the Pacific Ocean, from Southern California to Alaska, from the western Aleutian Islands to Japan.
Pacific giant octopus has a high IQ. They can learn to open cans, imitate other octopus, and successfully pass the riddle in the experiment. Their exact number is not clear, and they are not endangered animals and have no natural enemies at present. However, they are very sensitive to the environment and may be threatened by serious pollution.
Morphological characteristics of octopus
There are about 650 species of octopus in the world, and their sizes vary greatly. The smallest octopus is O. arborescens, which is about 5 cm (2 inches) long, while the largest octopus can reach 5.4 meters (18 feet) and its wrist can reach 9 meters (30 feet). The body of a typical octopus is cystic; The boundary between the head and the body is not obvious, with large compound eyes and 8 retractable wrists. Each wrist has two rows of fleshy suckers, which can strongly hold other things. The base of the wrist is connected with a webbed tissue called a skirt, and its center has a mouth. There are a pair of sharp horny palates and file-like toothed tongues in the mouth, which are used to drill through shells and scrape their meat.
Octopus is dioecious. The male body has a specialized wrist, called the stem wrist or the cross wrist, which is used to put the sperm bag directly into the female body's coat cavity. Common octopus mates in winter. Eggs are about 0.3 cm (1/8 inch) in length, and the total number is more than100000, and they are produced under rocks or in caves. The larvae hatch after 4 ~ 8 weeks. During the incubation period, the females guard the eggs, clean them with suction cups and stir them with water. Young octopus looks like an adult and is small. After hatching, it needs to drift with plankton for several weeks, and then sink to the bottom of the water for concealment.
Octopus can not only spray ink six times in a row, but also change its color and structure like the most flexible chameleon, becoming like a stone covered with algae, and then suddenly pounce on its prey, which has no time to realize what happened. Octopus can use its flexible wrist to crawl between rocks, crevices and seabed, sometimes disguising itself as a bunch of corals, and sometimes as a pile of shiny gravel. Mark of the University of Melbourne, Australia? Norman, in 1998, an octopus was found in the estuary waters near Sulawesi, Indonesia, which can quickly mimic into poisonous creatures such as sea snakes, lionfish and jellyfish to avoid attacks.
Octopus species classification
Pacific giant octopus
Giant octopus
Pacific octopus
Dana octopus
Dumbo octopus
Pig octopus
Arboreal octopus
Octopus ekulitus
Ma Jing nei te si octopus
Octopus can be divided into three categories: octopus, octopus and octopus [2], which are distributed in the north and south coasts of China. Octopus octopuses, also known as rice octopus, is a small octopus. Octopus octopuses, commonly known as long-legged octopus, look at the tide and have a relatively long body.
Typical species
Blue ring octopus
The most poisonous octopus in the world is the blue-ringed octopus, which is mainly distributed near Australian waters. Being bitten by this small octopus can kill people. However, this octopus generally does not take the initiative to attack humans. People should be careful not to step on it when playing at the seaside.
True octopus
Octopus octopus is an important fishing target in China, mainly distributed in the southeast coast, with more in Zhoushan, Zhejiang, Pingjiao, Xiapu, Xiamen, Shantou, Taishan, Dianbai, Zhanjiang and Beihai, Guangxi. It is widely distributed in the Pacific Ocean, Indian Ocean, Atlantic Ocean and Mediterranean Sea south of Japan. The fishing season is divided into spring and autumn, from March to May in spring and from September to11month in autumn.