Have you seen these awesome thimble jellies (Linuche aquila) in the Jellies Experience?
Sometimes we import our jellies, and sometimes, well, we get lucky: these were grown from polyps that our clever aquarists discovered on rocks in our tropical exhibits.
The medusae (bell) of thimble jellies grow and harvest algae, called zooxanthellae, for sustenance. That’s brown coloration you see in the photos. In nature, these jellies collect in bunches at the surface. Their polyps live in long chitonous tubes, which is very different from the typical fixed jellyfish polyp.
But beware: Thimble jellies are also responsible for “sea bathers eruption” in tropical climes, such as the Caribbean. When the jellies spawn and their larvae form, they get stuck in skin or bathing suits, with unpleasant results!