Jellyfish help to stir up the ocean as they move, researchers have found.
Using a green dye scientists showed how the animals' umbrella-shaped bodies were a key factor in this mixing.
The distribution of heat, nutrients and chemicals helps maintain the marine environment and has an important influence on global climate.
Reporting in the journal Nature, the researchers said that marine animals of many shapes and sizes contributed to ocean turbulence.
Footage courtesy of K.Katija/J.Dabiri