Ocean Fish Evolution 3D is a casual mobile game that has no in-app purchases and no advertisements. The game is based in a fantasy world where fishes are the most important life forms. There are a variety of different fish species that you can interact with. Some of them are smaller and some are larger than you. Some are stronger than you and some are weaker.

The goal of the game is to reach the highest level in the world. To do this, you need to eat other fish species to grow and evolve. The more you eat, the more you grow and evolve. However, you need to be careful of larger fish species because they will eat you.

There are many different levels in the game. Every time you pass a level, you will gain experience and strength. This will help you to evolve and grow stronger.