A free program for Android, by Kiemura Ltd..
Piranh.io Offline io game with Megalodon is a game with a 3D environment, where you are a shark or a piranha in the ocean. The sharks have a 3D model, and their movement is realistic.
The game is played on a map that is divided into small blocks. You can move around the map and eat other creatures. To grow, you need to eat the creatures. To increase your size, you need to grow as fast as possible. You can only grow by eating the creatures.
The goal is to reach the other side of the map. On your way, you can find various power-ups that will help you. You can find a jetpack, a rocket, a time bomb, a trap, and a flying drone.