Habitat: Inhabit mid-range to deep coral reefs. Often abundant on steep slopes, in Bocas under 5 m deep. Distribution: Through out the Caribbean. Depth: 50 - 130 ft. Characteristics: Barrel shaped, with thick walls. Purple to red-brown externally, tan internally.Surface with protuberances with round or blade-like outlines. Brittle and crumbly in consistency. Oscules on the inner side of vase (2-3 mm wide)