rhizostoma pulmo, commonly known as barrel jellyfish, dustbin-lid jellyfish or frilly-mouthed jellyfish floating in sea

animal aqua aquatic barrel beach beautiful biology black blue bottom commonly creature dangerous dustbinlid environment europe fauna floating frillymouthed gill invertebrate jellyfish known life marine medusa nature ocean organism poison pulmo rhizostoma ripple sea slimy stinger stinging summer sunlight surface swim tentacle tourism transparent travel tropical undersea underwater vacation water wildlife zoology