In the depths of the sea, there is a hermaphrodite creature that likes group sex, named sea rabbit, also known as sea slug. Because it looks like a rabbit, it is also called a sea rabbit. During the evolution of this sea rabbit, in order to adapt to the deep sea environment, the sea rabbit became a hermaphrodite creature. A sea rabbit has both female organs and male organs. During reproduction, the male organs of A sea rabbit and B sea rabbit move, and then the female organs of C sea rabbit move with the male organs of B sea rabbit, as well as D sea rabbit, F sea rabbit, etc., which are intertwined to form a ring. From a distance, you will think that a group of cute little sea rabbits are playing with the pyramid. In fact, they are carrying out serious and serious breeding activities. The key is that this activity of sea rabbits can be carried out for several days at a time!
There is also an equally interesting creature, called Atlantic flatshell, which looks like an oyster. This creature lives along the coast of North America. Unlike sea rabbits, they are not both female and male. Adult male flat shells are swimming in the sea while looking for their spouses. When they find it, they lie on the female flat shell and then carry out reproductive activities. In a few days, this male flat shell will lose his male organs and become a female scallop, waiting for another male flat shell to come and be lucky. Therefore, the sex of Atlantic flat shell is easy to distinguish, the top flat shell is male and the bottom is female. The difference between females and males before is just the difference before and after reproductive activities.
Nature is so amazing. It has evolved not only gendered species, but also genderless species, as well as bisexual creatures such as sea rabbits and Atlantic mussels.