Reaper Leviathan Skeletons

Reaper Leviathan remains can be found on the floor of the Inactive Lava Zone, and within the Mountains corridor. They are either found as whole skeletons, or just skulls. The Reapers came to be in these locations due to Sea Dragon Leviathans making infrequent trips to the surface to hunt them, and then bring them back down to eat due to their original food source being eradicated by Kharaa.