Blue dragons are tiny sea creatures, but they can cause painful stings. A bad reaction to a blue dragon sting can cause vomiting and disorientation.
The bite of these organisms “can be 3 to 5 times more [painful] than the bite of a Portuguese man-of-war,” warned Jace Tunnell, a marine biologist at Texas A&M University-Corpus Christi. They live in the Atlantic, Pacific and Indian oceans, but their habitat is expanding.