pink toadstool leather coral

adaptable aggressive alcyoniidae algae alive animal aquarium aquatic biology blue cap closeup coral environment exotic flared hardy head invertebrate isolated leather leathery life living many marine multiple mushroomshaped natural nature ocean overhead photosynthesis pink polyps retractable saltwater sarcophyton sea short single soft solitary spinospiculatum stalk symbiotic terpenes texture toadstool toxic tropical trunk underwater view water wild wildlife zoology zooxanthellae