Question

Why are there only a limited number of top predators in the ocean?

Answer 1

because the top of the food chain isn't for everyone, if you cant eat, then you are eaten. If you can be eaten by the top predators, then you are dead, but if not then you are one of the top predators

Answer 2

Because if they are too many predators and not enough prey then the prey will all be eaten and no more prey would be left