yellow tube sea sponge - aplysina aerophoba, underwater image into the mediterranean sea

yellow tube sea sponge aplysina aerophoba underwater image mediterranean adriatic fistularis aplysinidae aquatic aquaworld beautiful biodiversity blue bottom chondrosia closeup color colorful deep diving ecosystem exotic life marine fauna oceanographic oceanography photography saltwater sarcotragus scene scuba seascape serenity spinosulus sponges submarine tropic under water undersea