Aquar.io is another awesome fish io game online made by the creators of Oceanar.io. Control an army of angler fish, navigate them around deep waters and make them eat seafood to grow bigger. You start with only one fish queen and your goal is to form a school of fish, which will follow the former fish everywhere it goes. Different kinds of fish can be merged together to form more powerful species. Move your mouse cursor around the screen to send your army into the direction you are pointing to. Use your mouse scroll to zoom in and out. Click and hold your left mouse button to order the smaller fish to attack. Click the right mouse button to merge the creatures. Click and hold the right mouse button to devour your school of fish and gain experience points for your queen. Once your fish queen gains a specific amount of XP, it evolves into the next level and becomes stronger than before. Can you dominate the ocean in Aquar.io?