Fauna is the term for animals, in this case, the animals of Planet 4546B. Fauna in Subnautica can be found all over the planet, from the mysterious depths of the Crystal Caves to the vibrant Safe Shallows, and the fiery pits of the Lava Lakes.

Fauna on Planet 4546B comes in all shapes, sizes, and forms. Ranging from the tiny, cave-dwelling Rockgrub, to the colossal Sea Dragon Leviathan that spews molten minerals from its mouth. Fauna on Planet 4546B is capable of enduring and adapting to various environments, although previously unable to thrive due to the presence of the Kharaa Bacterium. Certain species of small fauna can sometimes be seen forming mostly non-interactive shoals. Fauna on 4546B also has yellow blood. The fact that the appearance of some species of the planet being similar to that of planet Earth species can be explained as a simple case of convergent evolution.

The player can scan Fauna with the Scanner, the same as they would with Flora and objects, allowing them to view information about the creatures in their PDA..

In Subnautica additional scans after unlocking the Data Bank Entry for that particular species of Fauna alert the player as to whether or not the specimen is infected with Kharaa. As Kharaa has been eliminated from the wild in Below Zero this function is not present.

Reaper Leviathan

Oculus Fish

Arctic Peeper

Shadow Leviathan

Ghost Leviathan

Gargantuan Leviathan Fossil

A full study of the Fauna of Planet 4546B sofar