With more than 200 species found worldwide, jellyfish
are one of the world’s most common sea creatures.
They range in size from under an inch to giants with tentacles
measuring over 100 feet.
All jellyfish have a bell shape and long tentacles. They
lack a brain, heart, bones, and gills, and are composed
mostly of water. Their bodies are thin enough to allow
oxygen to pass from the water directly into their internal
Jellyfish have specialized stinging cells called nematocysts.
Used only once and then replaced, nematocysts help jellyfish
capture prey and defend themselves.
This exhibit features moon jellyfish (Aurelia aurita) that
were raised at the Aquarium.