underwater shot of aurelia hawaii, moon jellyfish, saucer jelly floating in the dark open deep sea. family ulmaridae

jellyfish underwater sea floating aurelia aurita water ulmaridae marine medusa animal nature ocean aquatic wildlife moon wild diving scyphozoa semaeostomeae tentacles fauna swimming translucent swim aquarium ecology life jelly fish dark light zoology jellies creature blue beautiful saucer deep cnidaria common gonads waterscape aqua behaviour biodiversity hawaii