I am definitely not the first person to write about the Blue-ringed Octopus, but once you’ve seen one for yourself it is quite understandable that divers get excited about them. Blue-ringed Octopus are one of the few invertebrates you can call “cute”. Small size (Check!), adorable way of crawling around (Check!), innocent looking (Check!) and iridescent blue rings they look like something out of a cartoon (Check!). With the added level of spice that these are also one of the world’s most venomous animals, it’s only normal that people are interested in these critters.