Blue ringed octopus are some of the most beautiful creatures in the ocean, ranging from the Pacific to the Indian ocean. These incredible creatures are a smaller breed of octopus that is extremely venomous. The coolest thing about these octopi is that they have blue rings around their body, that can glow like neon when they are in danger. They have a blue pigment in their skin that they push into small rings on their body to warn away predators.