Triskelegants

"The roiling beast seems determined to drive itself further into the deep. Your vessel bucks and heaves as the maelstrom peels the plates from your hull."

Triskelegants are strange, triangular-shaped creatures that roam the depths of the Unterzee. Upon receiving fatal wounds, they expel water from their many maws and rotate extremely quickly, seemingly attempting to drill further into the depths. Unfortunately for those nearby, this death-spin can generate a maelstrom strong enough to pull plates from a zubmarine's hull.