yellow tube sponge, aplysina aerophoba, with a light turquoise background. picture from the adriatic sea, croatia

aplysina aerophoba yellow tube sponge underwater marine nature sea wildlife area bay life mediterranean protected dive aureate diving fauna undersea wild ecosystem travel benthic chondrosia coralegenous reniformis sarcotragus spinosulus sponges golden adriatic adventure animal aquatic croatia veli losinj scuba biodiversity in