Angler fish
Found within an underwater lake in Blackrock, angler fish are best known for the ghostly lanterns hanging from their arcing, bony spines. The feature casts the terrible visage of these enormous fishes in a spectral green light which adds an added layer of menace to the jagged teeth that protrude from their maws at all angles.
After sea monsters made their presence know, a more ominous member of the species was sighted in the Sefyric Ocean off the coast of Tapoa.