Nixies

Water-based relatives of the Elves of old, Nixies have been known to harass travelers near the shores as well as those at sea. Whether or not they are truly evil, they are highly aggressive towards strangers, thus making them very dangerous. They are often seen with Seahorses and other, larger creatures of the ocean.

They can be found in any depth of water, from shallows to the open sea.

Nixies appear only in Ultima IV, apparently content to remain beneath the waves in later times.