The top kings of mollusks: squid and octopus
The squid's body is soft and flat, and it swims extremely fast, reaching 150km/h; In order to quickly get rid of the enemy, the ink sacs in its body spew out black ink to dye the sea water black and cover their escape, but note that these inks can be stored for a long time, so the squid is reluctant to use unless it is a last resort; There are millions of pigment cells in the body of the squid, there are red, yellow, black, blue and other colors, can change the color of the body in a few seconds, while the wave-like swimming escape, is a good way to deal with predators.
There are as many as 350 species of squid, living in the depths of various oceans, varying in length, from 2cm to 2m.
The length of the king squid is generally 30cm-50cm, but some can grow to 21m and weigh up to 2000kg; The eyes are very large, up to 5 cm in diameter; The suction cup diameter is about 8cm; They forage in the deep sea, feeding mainly on fish, and rival sperm whales, often engaged in fierce dragon fights until everyone was scarred. Nowadays, they are not found in the king squid habitat, but only through the corpse or limb that floated to the coast after death to study the physiological characteristics of the king squid.
Vampire gun squid, living in the deep sea, black all over, glittering eyes, long brachiopods supporting the large head of the bowl, looks very strange; So far no blood-sucking gun squid has been observed eating, only inferring that the squid's glowing eyes are a brilliant trick to attract fish.
Octopus is a distant relative of squid, soft throughout, no shell to help protect the body, able to squeeze the body into a small space; Bird-beak-like mouths, which can bite through the shells of their shrimp and crabs, inject neurotoxins, and then enjoy a meal; Octopus has 8 long brachiopods, which have 240 suction cups to help the octopus suck and crawl steadily; There are sharp teeth around the suction cup, so that the shell can not resist the strength of the shell.
Blue-ringed octopuses are a dangerous animal whose secreted toxins are deadly; Fortunately, the blue-ringed octopus has a gentle temperament and will not take the initiative to attack the enemy; If the heavens and the earth are close, the blue-ringed octopus only emits a blue-light warning through the bright blue rings on its body.
It is also worth mentioning the hippocampus, which belongs to the fish, although it does not look like a fish; It is a uniquely shaped animal with a tube-like mouth and a horse-like head, which is also the origin of the name seahorse; The seahorse's ventral and caudal fins have degenerated, but its long tail is flexible enough to grasp seagrasses and rocks to help hold it in place; The hippocampus swims very slowly, which is in harmony with their gentle disposition, and their straight bodies move forward slowly, looking funny.
The seahorse belongs to the family Sea Dragon and is a close relative of the Sea Dragon; They live in tropical oceans, are 3.8cm-30.5 cm long, and eat plankton as a small marine animal; it is worth mentioning that the seahorse is hatched by male seahorses. The nursery bag in the abdomen of the seahorse, which accepts the fertilized eggs of the female seahorse and then hatches after more than a hard month, after a very painful process, the seahorse babies are born one by one.
The yellow skin of the seahorse, hiding in the seagrass, is very good at camouflage, which is also the result of natural selection.
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