The blue dragon, known as Glaucus atlanticus, is a sea slug that defends itself by converting its prey's venom into its own weapon. Measuring just about an inch, it floats atop the ocean where its silvery-blue color camouflages it from both above and below. Its primary meal is the Portuguese man owar, a creature with potent venomous tentacles. The blue dragon is immune to this venom and stores the stinging cells on its feather-like appendages, giving it a sting even more painful than that of its