Habitat: Common in patch reef, in rock substrate and littoral rock, sandy areas with small corals, and sometimes in Thalassia.(2-30 m deep) Distribution: Nuestra Señora del Rosario Archipelago, Colombia, Bocas del Toro Panamá. Characteristics: Cylindrical tubes (4-78 cm high, 2-13 cm wide) emerge from basal mass. Dark reddish-brown externally, tan internally. Hard and dense. Smooth to the touch, with rugose and uneven parts, sometimes covered by zooanthids. Oscules on the inner wall of tubes (0.6-3.4 mm wide).