large pink jellyfish in dark sea water with long tentacles. marine animal swims underwater. exotic wildlife medusa with

jellyfish underwater aquatic ocean sea water animal life marine nature fish wildlife aquarium blue tropical exotic deep poison swim transparent biology float glow glowing semitransparent wild tentacle danger medusa light toxic dangerous poisonous nettle oceanography diving fluorescent jelly fauna neon pink dark cnidarian invertebrate plankton depth bioluminescence creature