Sea hag

Sea hags are terrifying sea creatures with deceptive, siren-like faces surrrounded by swirling masses of thick green-black tentacles which high above the ocean waves. The obscene bulk of a sea hag is vast beyond measurement, receding down beneath the surface in a monstrous black shape that has no visible end. Many-fanged mouths gape open all along their flanks, interspersed between thick tentacles many ship lengths long. Sea hags attack vessels by gnashing at their hulls and screaming otherworldly howls which resemble violent storms, lightning and thunder crackling in fearsome frenzy.