The Southern Cavern is a location in the Zahhab Region Depths in Endless Ocean 2. It is a small, dead-end cave found in the South Crevasse at a depth of about 410 feet, or 125 meters.

There are no aggressive creatures in the area that would pose a threat to the player, making it relatively easy to explore, unless the player counts the Bluntnose Sixgill Shark that patrols the vaguely-nearby Twin Caves.

Several Vampire Squids make their homes in this cave, and one of the Giant Siphonophores that make their homes in the Depths can be seen in the general vicinity.

A sister cave to the Southern Cavern can be found in the North Crevasse and is (rather obviously) called the Northern Cavern.