The Oceans Tiny Aliens

Alien or sea creature? This delicate blue organism is a nudibranch, a type of marine mollusk. Nudibranches are often confused for sea slugs, but the two groups are separate. The blue nudibranch seen here is just an inch (2.5 cm) long. It was found clinging to sargassum seaweed during a NOAA Life on the Edge mission in 2003. Scientists explored the continental