The Reaper Leviathan is a huge, aggressive fauna species. It is currently the third largest aggressive creature in the game, and the smallest and most common of the Leviathan-class creatures. Overall, it is the fifth largest life form in Subnautica, behind the Sea Emperor Leviathan, Sea Dragon Leviathan, Ghost Leviathan and the Reefback. There is a total of twenty two Reaper Leviathans on the map; eight reside in the Crash Zone, eight inhabit the Dunes biome, and six dwell in the Mountains biome.