poisonous rhizostoma pulmo swims in the water of the black sea in zaliznyi port in ukraine. blue jellyfish in transparent water

animal aquatic background barrel black blue bottom creature dangerous dustbinlid environment europe fauna frillymouthed jelly jellyfish kherson life marine medusa nature ocean organism poisonous port pulmo region rhizostoma rhizostomatidae ripple sand sandy scyphomedusa sea summer surface swim tentacle transparent tropical ukraine ukrainian underwater water wild wildlife yellow zaliznyi zoology