The blue-ringed octopus may look small and beautiful, but it is one of the most dangerous marine animals in the world. Found in the shallow waters of the Pacific and Indian Oceans, this tiny octopus is famous for its glowing blue rings — a warning sign that should never be ignored. Despite its small size, the blue-ringed octopus carries tetrodotoxin, an extremely powerful venom. There is currently no known antidote, making this animal both fascinating and dangerous. The bright blue rings appear

5 Blue-Ringed Octopus Facts That'll Leave You Shook!