The Upside-Down Jellyfish

Featured Video Play Icon

The upside-down jellyfish Cassiopea lives along the sea bottom in coastal regions. As its name suggests, the jellyfish rests upside-down with its bell against the sea floor and its frilly oral arms pointed upward. This jellyfish is a filter feeder, and it draws water up and through its arms by pulsing its bell. The video above visualizes this flow using dye. Each pulse propels fluid up through the arms and draws in fresh water from the surroundings. The frilly arms break up any large vortices from the pulsed flow and diffuse the filtered water as it moves upward. (Video credit: Applied Fluid Mechanics Laboratory at Oklahoma State University)

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: