Scores of the moon jellyfish are being cultivated.
Pictures taken by scientists reveal the unique symmetrical snow crystal shapes of the jellyfish, when viewed under the lens of a microscope.
As part of an experiment scientists at the Marine Biological Association are filming the jellyfish to document the decisions they make when searching for food.
Scientists say the palm-sized creatures share similar movements patterns to more sophisticated animals such as turtles, basking sharks and marine birds, particularly when searching for food.
John Rundle of the Marine Biological Association, who has cultured the jellyfish from infants to adults in the laboratory, said the largest now measures 3 ins (7 cm) in diameter.
He took pictures throughout their development and said they started out as small as 0.1 ins (3mm).
He said: “They grow very quickly and do not keep that shape for long. “We have built a special aquarium for the jellyfish with the water moving around in an ever circular flow.
“Jellyfish do not thrive in static water.”
Guy Baker, of the Marine Biological Association, said: “These things have to find food.
“They can’t just see it and get to it. “The idea is that there are patterns to search that maximise the chances of finding food.”