Why do almost all fish have the same shape?

You look at a fish and know right away it is fish, because they possess a rather characteristic body shape: soft, elongated body consisting of fins and tails. Why do fish always look like that?

There are 33,000 different species of fish living across rivers, lakes, seas, .

Fish is a predominantly aquatic animal. There are 33,000 different species of fish living across rivers, lakes, seas, . more than any other vertebrate species on Earth.

But even if there are tens of thousands of species, every time you see a fish, you will know immediately that it is a fish because of its characteristic body form: soft, elongated body with large fins and tails.

Why? What are the advantages of such a body structure when it comes to underwater survival? The video below not only answers these questions for you, but also introduces a lot of interesting things about the unique life of the creatures that inhabit the seabed.