blue-ringed octopus
Greater blue-ringed octopus (Hapalochlaena lunulata) Although potentially deadly when disturbed, blue-ringed octopuses, such as this tiny creature, are nonaggressive and reclusive, preferring to remain concealed in rock crevices, empty mollusk shells, or even discarded bottles. (more) blue-ringed octopus mollusk Also known as: Hapalochlaena Written by Manjishtha Bhattacharyya Manjishtha Bhattacharyya is an editor at Encyclopaedia Britannica. She holds a PhD...