Common name: Blue-ringed octopus. Scientific name: Hapalochlaena. Family: Octopodidae. Photo: Greg Rouse & Nerida Wilson/Australian Museum

I imagine this little octopus likes to bop around the Pacific and Indian oceans to Beyoncé’s cuz if you liked it then you should have put a ring on it.

Before it kills you.

On a lighter note, blue-ringed octopuses have many desirable characteristics. They can regenerate lost arms and spend much of their lives hiding in crevices. Win!

As I eloquently hinted, these octopuses are recognised as one of the most venomous marine critters. They produce venom that contains tetrodotoxin, 5-hydroxytryptamine, hyaluronidase, tyramine, histamine, tryptamine, octopamine, taurine, acetylcholine, dopamine, etc, etc, etc. Please, don’t touch.

Also I like to use the Australian Museum’s fishy happy snaps here, because they’re awesome. Over the past 10 days, museum scientists have been collecting more fish and photos (like this one) on a Timor-Leste Expedition. To see what’s involved in a collecting trip (other than 90 litres of ethanol), visit their blog or watch the video below.


  1. Really interesting creature – but now I have a very strange image in my head of the above octopus strutting around the seabed going “Oh, oh oh! Oh, oh, oh!”

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