Learn more about moon jellies!
Did you know that when food is limited, moon jellies can shrink to one-tenth of their size to save energy? They return to their previous size when more food becomes available.
With their translucent white bells—which can reach 12 inches in diameter—it’s not difficult to see where moon jellies get their name. Their bells are luminous with a blue-grey transparent disk in the center and glowing, horseshoe-shaped organs. Short, delicate, fringe-like tentacles hang from their bell margins. These tentacles deliver a very mild sting.
