Jellyfish are soft-bodied, free swimming aquatic animals with a gelatinous umbrella shaped bell, and long tentacles. Jellies have floated along the ocean currents for 500 million years, making them the world's oldest multi-organ animal.
The creature is an invertebrate made mostly of water, and has no heart, brain or bones.
Tiny stinging cells in the tentacles stun their prey and provide an easy way to catch dinner which can be fish, shrimp, crab, or even tiny plants. They move by squirting water from their mouth.
The jellies at the Planet Jellies exhibit at the Aquarium are translucent and are enhanced by the changing coloured lights.... a fascinating ballet of delicate movement.