More extreme and dangerous life lurks deeper in the oceans of Subnautica. Part two of a nature documentary studying planet 4546B. This video is the finale of my two-part series on the biology of the video game Subnautica. In these alien seas, breathtaking landscapes, enormous predators, and unexpected mysteries are all still waiting to be discovered. And just like how life in earth’s oceans gets stranger the deeper you dive, the depths of Planet 4546B are far more extreme than what’s on the surface.