red mushroom ,discosoma sp. corals, are in saltwater aquarium

actinodiscus anemone animal aquarium aquatic australia barrier beautiful biology bright closeup color colorful coral corallimorpharia decorative disc discosoma ecosystem elegant exotic fluorescens glowing indonesia large life macro marine mushroom photosynthesis pink polyp red reef rhodactis salt saltwater sea seascape soft texture thailand tropical ultra underwater vibrant water wild sp corals