Long ago, all life has emerged from the ocean. And it still flourishes there, even though concealed from our direct sight by the layer of water that is many meters thick. There, in the depth of the sea, you can meet the most incredible fish species and see all kinds of underwater wonders. However, life in the water is also cruel and dangerous. See if you can survive in this harsh world having started out as a tiny fish and then turned into a formidable marine predator!