Small but deadly

Blue-ringed octopus: spectacular and venomous, this animal runs rings around the competition.

Jet-setters

Did you know, Blue-ringed octopus can move by crawling along the bottom of the ocean on their arms BUT if they want to go much faster they can expel water from a cavity in their body to push them along. Jet propulsion, octopus style!

Blue-ringed octopus, <i>Hapalochlaena maculosa</i>.
Blue-ringed octopus, Hapalochlaena maculosa.

Shoulda put a ring on it

Blue-ringed octopus don’t always flash their iridescent blue rings. In fact, they are usually a sandy brown colour and only flash their rings when they are feeling threatened or under attack. Nature uses colourations like this as a warning to stay away! In most species approximately 60 rings cover the skin of each Blue-ringed octopus. Always remember, look but don’t touch.

Tough love

Blue ringed-octopus have three hearts, but this doesn’t help them in the romance stakes! Both male and female Blue-ringed octopus die during the reproductive process. The male dies soon immediately after mating. The female, however, lays her eggs then literally guards them with her life until they hatch.

Blue-ringed Octopus
Southern Blue-ringed Octopus (Hapalochlaena maculosa) photographed in Port Phillip Bay at night.

Size (doesn't) matter

Blue-ringed octopus are tiny! However, despite their small size they are one of the world’s most venomous animals. A bite from a Blue-ringed octopus can paralyse a human within minutes and there is no known antidote.

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