Earthworms, hermaphroditic. Earthworms and snails in invertebrates are hermaphroditic animals; Jellyfish, Schistosoma japonicum and squid are all hermaphroditic animals. Vertebrates are usually hermaphroditic. All hindbranchial animals are hermaphroditic. They have female and male reproductive organs and can produce sperm and eggs at the same time. The genitals of post-branchial animals are located on the right side of the body and highly specialized to prevent self-fertilization. When mating, a pair of hind branchial animals will approach each other's right side and then exchange sperm. After fertilization, they will stick the eggs together with mucus and then fix them on the hard rock surface to form a banded egg bundle. That is, sea slugs, sea rabbits and gyroscopes. Coral: Some species of coral are unisexual and hermaphroditic, while others are hermaphroditic, which can play the role of female laying eggs and male releasing sperm. About three-quarters of corals are hermaphroditic nematodes: nematodes are hermaphroditic, male and hermaphroditic, which can produce sperm and eggs by themselves, so they can establish offspring with the same genome without mating. Each hermaphrodite can produce 200 ~ 300 offspring. Leech: hermaphrodite, each leech can lay eggs and reproduce, with strong vitality. Earthworms: but they can't reproduce themselves. They must mate with others, such as groupers. 1. Atlantic Flat Shell There is an interesting Atlantic flat shell along the coast of North America. The male flat shell roams underwater until he finally finds a suitable mate. At this time, it landed on the back of the mother flat shell. Before long, the male flat shell will lose its genitals and become a female flat shell completely. Later, another male flat shell will fall on it and become a female. This mating process forms a tower-shaped flat shell chain, the lower layer is female and the upper layer is male flat shell, and this structure will be built higher and higher. All the males wander at the bottom of the water, while the females lie motionless at the bottom of the water from morning till night. 2. barnacles mature barnacles are hermaphroditic creatures-that is, each barnacle has male and female reproductive organs. Barnacles like to live in groups, as if they feel safe, but too dense a community will lead to a large number of barnacle larvae dying. Sometimes barnacles take this way to avoid overcrowding-they are densely attached to ships, and this crisis is passed on to human beings. In order to adapt to this upside-down lifestyle, barnacles have ovaries on their heads. Fish "clean fish" has such an interesting name because they tirelessly clean their mouths and fins for other fish. In this fish, male chauvinism reached its peak. A male fish has three rooms and four concubines. These females are not allowed to leave the active waters of the males, nor will they unite against this unreasonable "husband". Sometimes, a male fish is followed by two to five females. They are arranged in a long string, and their order is strictly in accordance with the grade. When the male fish dies, the highest-ranking female fish becomes the leader of this group of fish. In a few days, it will automatically grow male genitals and become a real male fish, while the remaining female fish will become its wives and concubines. 4. "Cotton Scale Insect", named after its cotton scale, has been endangering orchards in California. Later, people introduced its natural enemy, the Australian ladybug, to control them effectively. This insect has no mating problem, because they are self-mating-this mating method is not common even in hermaphroditic animals. It is difficult for us to call this insect male or female because it is both male and female. 5. Earthworm is a common reptile, but its reproduction mode is extremely strange. Earthworms mate in groups. They lie upright first, and then stick together firmly with secreted mucus. At this time, they lay eggs in section 15, and in section 9 10, they absorb these eggs and fertilize them. These eggs are stored in the spine of earthworms and hatch after two to three weeks. This "mating" process of earthworms usually lasts for several hours. 6. European oyster, a soft little creature, is the most typical hermaphrodite. They take turns to play gender roles: first men, then women. They can do this because there are two kinds of reproductive organs in the body, and this process of alternation between men and women is called "rhythmic continuous hermaphroditism". Oysters living all over Britain take turns to play gender roles year after year; However, oysters that live in warm land and sea can play both male and female roles in the same season. This European oyster has a very hard shell and is not easy to attack. They mate only after the full moon or new moon, not so much because of spring tide as because of spring sleep. 7. Land snails, a common animal, are also hermaphroditic, and their mating process is full of excitement and unique romantic sentiment. In winter, snails dig holes in the ground and hide themselves in hard shells. Spring is coming, keep up your spirits and long for your partner. The male reproductive organ of a snail includes a small capsule filled with "Arrow of Love"-it can launch this thin-boned missile at any time. When two affectionate snails embrace each other, they will shoot arrows into each other's bodies and complete the process of exchanging sperm with each other. 8. Leeches Leeches are also hermaphroditic. After their eggs hatch into larvae, the larvae can lay eggs without mating. In this way, a leech egg can eventually become tens of millions of leeches. Leeches are mainly parasitic on domestic animals, such as cattle and sheep. After drinking the polluted water, the cattle and sheep came to the carcasses of these livestock, moved accurately to the liver, and finally settled down comfortably there. 9. Parasitic wasps Small parasitic wasps are often called "hermaphrodites", that is, their male and female chromosomes are mixed together in disorder. Their behavior undoubtedly shows that their most important sexual organ is the "brain". For example, after a normal male parasitic bee mates with a female parasitic bee, the female bee will sting moth larvae and lay eggs in her body. However, some parasitic bees have a male brain and a female body-this is hermaphroditism, and then their mating behavior will be disordered: they will sting the female bees and try to mate with moth larvae. It will even fuck around without mating with the mother bee; Or stop suddenly at the beginning of mating, as if remembering something important. 10. Sea bass is a delicious fish, and it has also undergone a complete transformation-from a mature female to a mature male. This denaturation process is usually carried out when the sea bass is 5 years old. There is a subspecies of sea bass called banded sand fish, which is abundant in Florida waters. This kind of fish can fertilize itself. 1 1. Sea rabbits are actually snails in the sea. Because they can't exchange sperm with their spouses-although they are hermaphroditic, they are forced to mate in groups. Usually, a sea rabbit lies on another sea rabbit, and the latter lies on another sea rabbit: sometimes, a dozen sea rabbits are playing this pyramid-shaped trick. Some observers reported that this pyramid form will evolve into a ring. Sea rabbits can grow up to 30 inches. They mainly live in equatorial and temperate coastal areas. 12. The size of sea squirts varies from less than 1 mm to more than 1 ft. When they were young, they looked like tadpoles, but when they grew up, they looked like a plant. Sea squirts are also hermaphroditic creatures, but unlike other such creatures, they can reproduce through the combination of ordinary sperm and eggs, but they can also reproduce through "hair". However, the second generation of "germinated" sea squirts must mate to produce the next generation, and this generation of sea squirts will "germinate" again. The "bud" of sea squirts is similar to that of potatoes. Their way of asexual reproduction from generation to generation enables sea squirts to spread all over the world, but at the same time, they keep themselves at a very low level of evolution. 13. Ship maggots are actually not maggots, but bivalves, just like oysters. It lays a lot of eggs-about 5 million a year, and then changes its sex. It uses a hard shell to make holes in wood, and eats wood while digging. In the era of wooden boats and wooden docks, ship maggots are a very dangerous creature. 14. Spoon maggots live in the sea, and their larvae live a fairy tale life. When a young spoon maggot receives a kiss from a mature female spoon maggot, it suddenly becomes a young male spoon maggot. If it doesn't have this "affair", then it can only honestly stay under the reef, grow and grow, and finally become a sausage-shaped female spoon maggot, about 4 inches long. Because the length of male spoon maggots is smaller than that of female spoon maggots 1/60, they have to climb into female spoon maggots to mate. Sometimes there are 85 male spoon maggots in a female spoon maggot. A few really got into the egg nest and faithfully performed the insemination task, but most of the male spoonfuls of maggots were just for fun and could ride around for free!