Blue Dragon (Glaucus Atlanticus)

The blue dragon is a small sea slug species that belongs to the Glaucidae family. They are also known as blue sea slugs, blue angel, blue glaucus, or blue ocean slugs. The pelagic slugs are known to float upside down, working with the water’s surface tension to stay up. 

Their stomach also stores an air bubble, which helps it stay afloat. The slug is quite small, measuring just about 3 centimeters in length. They primarily feed on the marine hydrozoan, the Portuguese man o’ war as well as other pelagic creatures. They also steal appendages from the man-of-wars’ adding them to their own as a protection mechanism to scare off predators.