The blue dragon sea slug is so poisonous that it shut down seven miles of a beach in Spain. The tiny creature absorbs venom from the other creatures it eats, like the Portuguese man o-war, making its sting extra painful. They typically prefer warmer temperatures, but because of global warming, they've been spotted outside their typical habitat. | CBS News

📸: Jacinta Shackleton • Glaucus atlanticus sea slug, or blue dragon, is a pelagic nudibranch that sails on the surface of the ocean. They are typically just an inch long, and feed on the toxins of much larger species such as Portuguese man o’ wars, which have tentacles around 30 feet. The blue dragon is immune to the toxins, and collects them in special sacs within the finger-like branches at the end of its appendages. When threatened or touched, it can release stinging cells with more powerful