Glowcrab
These glowing bioluminescent crabs are native to West Star. They thrive on the underside of Barrigan's Isle, a floating island known by the natives as "Balucrafa", literally the Aquan for "glowcrab reef".
As well as merely being native Aqueous creatures, Glowcrabs have a minor celestial connection to West Star, such that items and equipment fashioned from their shells can contain a small amount of aquatic magic. William Barrigan's cutlass, which was made from glowcrab shell, allowed him to cast Hydraulic Push.