Second, squid is also a shellfish, and their shells have evolved into inner shells in the long-term evolution. The inner shell is porous, which can store air like a swim bladder, control buoyancy and help them swim and keep their balance, which is beyond the reach of other shellfish.
3. Squids, also known as rockets in the ocean, use the reaction force of water spray to push their bodies forward quickly, and the fastest sprint speed can reach 150 kilometers per hour.
Four, squid has three hearts.
5. The blood of squid is blue.
Six, squid * * * has ten wrists, eight of which are short wrists, and the inside is covered with strong suction cups. The other two are highly specialized wrists, which are used to catch prey quickly. All ten wrists are their fighting weapons.
Seven, squid has nine brains, of which the main brain is located in the head, and the other eight auxiliary brains are located in eight short wrists. Therefore, each of their short wrists seems to have their own thinking needs. Only by working together can we deal with powerful enemies.
Eight, the main food of squid is worms, crabs, small fish, etc., and some species will devour the same kind.
Nine, squid is color blind and can't distinguish a variety of colors, but the W-shaped pupil makes them have a super wide-angle field of vision and can see the objects behind them.
Ten, when in danger, they will quickly spray ink from the wooden bag, dye the sea water black, and then run away.
1 1 The natural enemies of squid are mainly sperm whales, dolphins and sharks.
12. There are millions of red, yellow, blue, black and other pigment cells in the body of squid. Their nervous system is developed, and they can respond quickly according to the environment or mood, and adjust the size of pigment cells to change their body color. They often use it to confuse their prey or escape the enemy, and the whole process takes only one or two seconds.
13. During the breeding period, some male squid will pretend to be female squid. On the one hand, these weak squid can be protected from other male squid. On the other hand, they take this opportunity to get close to the female squid. Get a chance to mate.
14, squid will migrate to the shallow sea in spring, lay eggs, and die soon. They almost use their lives to reproduce.
15, the average life span of squid is only one to three years.