Most venomous creature in the ocean

The blue ringed octopus is one of the most venomous creature in the ocean. This tiny octopus, which grows no larger than 8 inches, has a powerful toxin that can immobilize and kill a person unless given CPR until the toxin dissipates. This toxin, called tetrodotoxin, is produced by a symbiotic bacteria that lives in the blue ringed octopus’ saliva. Tetrodotoxin is also found in pufferfish and cone snails. The venomous blue ringed octopus uses this powerful toxin to capture its prey which includes crabs, fish and mollusks. Blue ringed octopus live in shallow, rocky or sandy habitats in the western Pacific or Indo-Pacific oceans. Learn more about the most venomous creature in the ocean.