User blog comment:Reapy The Reaper Leviathan/New Subnautica Challenge/@comment-35748056-20181124194505/@comment-31440879-20181125040010

That is not necessarily true: via the Bulb Zone-Mountains entrance to the Lost River, and by extension the Inactive Lava Zone, one can use a Seaglide and an Ultra High Capacity Tank to almost reach the Active Lava Zone in one breath from the surface. With the construction of a base or two, it can be done.