Neo Aquarium: The King of Crustaceans

This is a competitive 3D shooting game based on crustaceans. Yes, you read that right. You get to control unique creatures like lobsters, crabs and barnacles, in a wild water world that exceeds all human sense. Experience intense battles that take place in “NEO AQUARIUMS,” dimensionally linked aquariums that promote the evolution of organisms, and use skills that are unique to arthropods, such as “molting” and “self-amputation.” (Mobygames)