yes a box jellyfish can be eaten by a multitude of things such as turtles, spadefish, sunfish, and some loggerhead turtles. Hope it helps
it eat fishes
Plants, seeds, isects, Small fish, eggs, and invertibrates. They are carnivores.
They capture food in their tenticles and inject poisonous barbs to kill their prey. they the bring the food to their mouths and digest it.
Sea turtles eat box jellyfish; they are unaffected by the deadly sting.