(geodia stellosa), white sea sponge in an underwater cave on an underwater rock in western crimea, tarkhankut

animal aqua aquatic benthal benthos bentos biofouling biological biology black crimea ecology environment exoskeleton fauna filtration filtrations fouling geodia haliclona invertebrate invertebrates life marine nature organisms overgrown porifera saltwater sea sessile spong sponge spongea sponges spongia stellosa tarkhankut under undersea underwater water wild wildlife world zoology