Why the Blue Ringed Octopus Is So Dangerous | Marine Science Explained The blue ringed octopus is one of the most fascinating yet dangerous marine animals found in the ocean. Despite its small size, this octopus carries extremely powerful venom that can seriously affect the human body. In this educational video, we explain how the blue ringed octopus venom impacts the nervous system and lungs, why its bite often goes unnoticed, and how loss of muscle control and breathing difficulty can occur ov