Habitat: On dead coral in reef environments (2-15 m deep). Distribution: Guadalupe, Martinique, Belize, Panamá. Characteristics: Thin encrusting sponge (1-2 mm in thickness), with a bright intense distinct cobalt blue, externally and internally. Smooth, and slippery surface, with regularly dispersed oscula (2-3 mm in diameter). A conspicuous star-shaped canal system surrounds each oscula.