blue poisonous rhizostomeae medusa floats in black sea water on the background of a sandy bottom zaliznyi port, kherson region,

alga animal aquatic background bell black blubber blue bottom dangerous dry environment europe fading fish floating gorgon grass jelly jellyfish kherson large marine medusa natural nature nettlefish ocean plant poisonous port region rhizostomae rhizostomeae ripple sand sandy sea summer surface swim transparent tropical ukraine ukrainian underwater water wild wildlife zalizny zaliznyi