BLUE Planet Aquarium in Cheshire Oaks is awash with hundreds of tiny jellyfish after an unexpected baby boom.
The jelly babies are actually upside down, or Cassiopeia, jellyfish which spend most of their life lying on their backs.
Found in shallow seas and mangroves, the Cassiopeia jellyfish is unique because, instead of drifting in the open ocean like most jellyfish species, it spends its life sitting on the muddy bottoms of inshore bays and ponds.
Upside-down jellyfish are so called because their tentacles and mouth face upwards.
James Dale of Blue Planet said: “Successfully re-creating the entire life cycle of the jellyfish in captivity is challenging and we’re delighted we’ve managed to perfect it.
“Each stage in their development is completely different from the last and, with such fragile creatures, it is a very delicate procedure to get them to reproduce.”