0 1 Do sharks eat people?

The horror impression of sharks probably comes from the killing and abuse of sharks in horror movies. Sharks have very sharp teeth, which can tear people to pieces in one bite. Their huge body and fast swimming speed are enough to give people a very powerful deterrent. Although sharks bite a living person in horror movies, sharks don't actually eat people.

Sharks evolved millions of years before humans appeared, and humans were not on the shark menu. Most sharks mainly eat smaller fish and invertebrates, while some larger sharks eat seals, sea lions and other marine mammals.

Whale shark is the largest fish in the ocean.

The largest fish in the ocean is whale shark, which can grow to 12.2 meters long and weigh 40 tons. Their heads are flat and wide, their noses are short, and there are pale spots and criss-crossing pale stripes on their backs. Feeding on plankton, squid and small fish.

Scientists believe that whale sharks can live for about 60- 100 years. There are few natural enemies except humans.

The sex of a turtle is determined by temperature.

The sex of most species is determined during fertilization, while the sex of turtles and crocodiles is determined after fertilization. The temperature of hatching eggs determines whether their offspring are female or male.

If the turtle eggs hatch below 27.7 degrees Celsius, Cheng Xiong turtles will hatch; If the eggs hatch above 3 1 celsius, they will hatch into female turtles, and the young turtles hatched at this intermediate temperature may be female or male.

04 discolored squid

In this world, there are many other creatures besides magicians. What else do you know besides chameleons? That's the soft egg in the ocean! They are squid! Squid! Octopus! (I didn't expect to catch Bian Xiao)

Cuttlefish, also known as squid, is a "makeup artist" in the ocean. There are not only ordinary monochromatic cells on the surface of their skin, but also a kind of rainbow cells, which can change more metal-like colors.