Ulmo´s cursed creature

Sea-kraken (S. "Belegaerog", pl. "Belegaeryg"; W. "Great Sea-demon") are similar to their fresh-water cousins, though they have grown much larger after untold centuries gorging themselves on the fish, birds, and mariners that journey across Middle-earth's seas.

History
While some kraken still sleep deep within the earth, many travelled through secret ways to the sea, there finding a realm large enough to support their voracious appetites. Over the years, these kraken have grown larger still than their ancestors, though many diminished in mind as they grew in strength. Lacking their forebears' cunning, they rely on their tremendous size and physical power to overwhelm and destroy their prey.

Habitat
Despite their size, sea-kraken are rarely found in the deepest sea. Their baneful nature drives them to prey upon ships of the Free Peoples, and thus they dwell in waters where such vessels commonly sail.

Society
Sea-kraken have little in the way of society. They are solitary creatures rarely encountered in groups, though if shipping dwindles in a region these creatures may compete for prey.

Usage
Sea-kraken serve as a dangerous hurdle for all mariners and any who travel the sea. Their ability to destroy a ship makes them one of the greatest challenges for characters embarking on a sea voyage. While they lack the cunning of their fresh-water ancestors, sea-kraken still possess rudimentary allegiance to the Shadow, and may seek out mariners who stand against it or who bear cargoes inimical to its cause.