Habitat: Found on reefs open habitats (> 10 m deep). Distribution: Belize, Colombia, Panamá, West Indies. Natural History Notes: This sponge has been studied for its biochemical properties but little is reported about its ecology. Characteristics: Thick encrusting to massive- lobate (up to 15 cm high). Brown to gray-black externally, tan internally. Some specimens show darker spots. Oscules with a membrane (1-2 cm wide). Smooth, but slightly rough surface to the touch. Compressible and dense.