Juergen Freund / Sponge {Axinella verrucosa} in underwater cave, Mediterranean

Roberto Rinaldi / Golden coral shrimp (stenopus spinosus) in Deer cave (grotta dei Cervi), Sardinia, Italy.

Roberto Rinaldi / Divers in narrow passage in Ghost Cave (Grotta dei Fantasmi), Alghero, Sardinia. Model released.

Roberto Rinaldi / Diver in Deer Cave (grotta dei cervi), Alghero, Sardinia, Italy, looking at stalactites.