Pink Tube Sponge, Haliclona mediterranea, Vis Island, Mediterranean Sea, Croatia

Yellow tube sponge (Aplysina fistularis), Dominica, West Indies, Caribbean, Central America

Diver and a Commerson's frogfish (Antennarius commersoni) perched on a tube sponge off Apo Island, Philippines

Netherland Antilles, Bonaire, Brittle Starfish on tube sponge.