For The Doubting Thomases

Ok you doubting Thomases (and Sanahs and Cals), here's proof of the blue-ringed octopus (Hapalochlaena lunulata) yesterday, which we found at Pante Parigi.

blue-ringed octopus

Notice that the brilliant blue rings give away the animal's identity.

Blue-ringed octopuses carry tetrodotoxin, a potent neurotoxin that has no known antidote...making it quite a bummer if you get bitten by one of these, as happens every once in a while to people wading in shallow reefs.

Incidentally, this is the same poison that makes eating pufferfish a risky proposition. Several other marine organisms are also known to make use of this neurotoxin, both for self defence and as a predatory aid.

One interesting nugget of information to remember for trivia octopuses don't make tetrodotoxin. Bacteria contained in their salivary glands do.

Finally, just in case you doubters still don't believe me, here's another photo, with the octopus sitting on a rock...again with blue rings just to reemphasise the point.

blue-ringed octopuses