Mucus from jellyfish that sit upside-down on the seafloor ... quite in the dark as to the nature of these curious bits of animal life.” The researchers found, however, that cassiosomes are ...

A luminous jellyfish with long trailing tentacles is a beautiful sight, as long as a scuba diver sees it in time to avoid contact. These scuba divers were finishing a dive in Akumal, Mexico and making ...