Are there any fish in the world?

Most of them are not! The ocean can't directly breed developed civilization, because it can't carry tools, and it will sink. The oxygen at the bottom of the deep sea is thin, which can't support the energy conversion of violent activities of large organisms, and food is scarce. So the possibility of underwater civilization is very low! Killer whales are the most typical. They have more developed brains, harmonious "society" and complex languages than human beings, but they still can't develop a high degree of civilization.

As for creatures with heads and fish bodies, it is not realistic. Creatures with human structures, such as eyes, nose, mouth and ears, respiratory system, skin and bones, are not suitable for long-term survival in the ocean. Even if they look alike from a distance, they will be completely different creatures! Like dugong or something!

In fact, human beings are very lonely, so in the long process of development, they will imagine some creatures similar to themselves, such as immortals, ghosts, mermaids and so on. There are similar legends about mermaids all over the world, not because this creature really exists! But because of the lonely homosexuality of human beings! Humans will set their eyes on any visible creature. Mermaid is not a legend of special existence! In fact, there are legends about the heads of birds and beasts all over the world, and there are even giants, villains, immortals and ghosts who look almost the same as people. Only in modern times when human footprints are more and more extensive and science is more and more developed, genies are generally denied by science, and mountains and deserts are also full of human traces. These magical creatures on the ground have no room for imagination! Only the ocean and the universe are still mysterious to people, so the legend of mermaids, the legend of aliens and the fantasy space will continue to be passed down with relish. ...

As for those messy reports, just watch a joke! The discovery of any new creature is a shock to the scientific community, and the whole world will know about it and join the research! If you find a butterfly or a fish, you will be recorded, won various awards and study hard! What's more, mermaid, a new system creature? Once there is, scientists all over the world will flock to it immediately!