Leviathans

Leviathans are enormous aquatic beasts.

Descriptions
Leviathans are serpentine sea monstrosities with purple eyes, fins, spindly teeth

They have very large mouths that glow red as if with fire

Known Leviathans
One leviathan guarded The Wildlandes. It surfaced out of the sea and attacked those who came near.

Trivia

 * The leviathan is the representation of the mouth of hell in some Abrahamic belief systems, which is connected to their in-book depiction as having glowing mouths.
 * It also can represent the sin of envy