A Fish That Can Evolve

A common man suddenly woke up in one of the cultivation worlds where normal people can be killed at any time but that is not all, but he discovers that he is not a human being either, but rather a fish that has a system that will take you to the pinnacle of all races (If you see any error, do not hesitate to comment, I am using the Google translator, so with your help I will be able to correct the novel to offer a better reading experience)