sea anemone (sagartia elegans) in the black sea on the sunken ship in deep water

actinia elegans actiniaria animal animalia anthozoa aqua aquarium aquatic benthos biological biology black sea fauna close cnidaria crimea cylista ecological ecology elegant anemone enthemonae europe hexacorallia invertebrate life marine mediterranean metridioidea nature odessa bay organisms sagartia sagartiidae saltwater small swim tentacles undersea underwater cave water world wild wildlife zoological zoology