
When the Kharaa Bacterium was released onto the planet, many creatures died, destroying the food source of the species. It's suggested that in the past these creatures would have traveled in small herds in the bottom of the trenches (that being the Crater Edge), occasionally coming to the surface to feast on the microorganisms in the shallower water. It also has a hole in the back with an unknown purpose, most likey for creating enzyme 42 or laying eggs.ĭespite its gargantuan size, the Sea Emperor Leviathan's diet consists solely of micro-organisms filtered from the water, much like real-life Baleen whales and Blue whales. Unlike the Sea Dragon Leviathan, the Sea Emperor Leviathan doesn't have true graspers instead, its forelimbs are two massive, paddle-like arms, similar to some paddles used by turtles, primarily used for stabilization while swimming and possibly used for defense against predators. The Sea Emperor Leviathan's posterior consists of seven long, yet slim tentacles ending with large tentacular clubs, with the largest being in the center, surrounded by the six smaller tentacles.

It has four binocular eyes, glowing cyan in color. The creature's head is comparatively small, and quite peculiar in shape (see "Trivia" below for more), featuring two striped antennae with glowing green lures atop its snout, two large mandibles on each side of its rather small mouth, and a glowing hollow between these mandibles. Its tentacles are adorned with bright cyan bioluminescent "bulbs." The Sea Emperor Leviathan is colossal, having a stocky, entirely armored body and is predominantly pale brown in color, with shades of green. It is sapient and telepathic, but unlike most Leviathans, it is not aggressive.


The Sea Emperor Leviathan is the largest of the living Leviathan class fauna found within the crater in Subnautica.
