Deep.io (Deepio) is a funny multiplayer online IO game aabcya.
In Deeeep io you start a game as a whitebait that continuously eats plankton and keeps growing & evolving into other creatures. There is another game by the same developer Raaaaft io. The guy keeps releasing games once in an year, but they become super popular.
Keep eating lots of food and other weacker animals and evolve into greater creatures with unique special abilities. Some of them can dig in earth, some can poison opponents, and some others become invisible, but they all have one thing in common: they eat or get eaten by others. So don't just float around and give your best to become a big and powerful animal.
Enjoy Deep.io at http://abcya4.net/io!