Leviathan

Leviathan are a family of amphibious Grimm. There are different sizes, ranging from the Krill Leviathan (A misleading name, as they average 3 feet in length) to the King Leviathan, a massive beast believed to be an oddity and not its own group.

Appearance
Regardless of size, Leviathan share a common appearance of something resembling crocodiles. They have bioluminescent red eyes, as many of them live in the deep seas. Their faces are, like most Grimm, covered with a white masklike structure. They have a long snout and a row of white spikes down their back.

Habitat
Despite being amphibious in nature and able to survive on land, Leviathans live in the seas of Vytal and prefer to stay underwater, as there they have an advantage over those who would attempt to kill them.

Combat
As they are an aquatic Grimm, they are difficult to kill from the surface.  Bullet-style projectiles become next to useless when firing at underwater targets, and humans are far slower in water than they would be on land.