From a research vessel on the surface, scientists piloted a remote-controlled submarine around a volcanic crater off the coast of Japan. Something disrupted the blue expanse and caught their attention ...

With its vivid blue float and glowing, radiating tentacles, the blue button jelly looks more like a creature from science ...

In a laboratory aquarium in northern Russia, a fluorescent green sea creature with 14 tentacles moved about. It ate, grew and eventually reproduced. A patient scientist watched the process, ...