Aurelia aurita (also called the common jellyfish, moon jellyfish, moon jelly or saucer jelly) is a widely studied species of the genus Aurelia.
The jellyfish is almost entirely translucent, usually about 25–40 cm (10–16 in) in diameter, and can be recognized by its four horseshoe-shaped gonads, easily seen through the top of the bell.
It feeds by collecting medusae, plankton, and mollusks with its tentacles, and bringing them into its body for digestion.
It is capable of only limited motion, and drifts with the current, even when swimming.
Aurelia does not have respiratory parts such as gills, lungs or trachea, it respires by diffusing oxygen from water through the thin membrane covering its body.
Source
The jellyfish is almost entirely translucent, usually about 25–40 cm (10–16 in) in diameter, and can be recognized by its four horseshoe-shaped gonads, easily seen through the top of the bell.
It feeds by collecting medusae, plankton, and mollusks with its tentacles, and bringing them into its body for digestion.
It is capable of only limited motion, and drifts with the current, even when swimming.
Aurelia does not have respiratory parts such as gills, lungs or trachea, it respires by diffusing oxygen from water through the thin membrane covering its body.
Source