The greater blue-ringed octopus (Hapalochlaena lunulata) by Samantha Craven
Only my second encounter with this tiniest of terrors. The three species of blue ringed octopus contain venom so potent that it contains all these words: tetrodotoxin, 5-hydroxytryptamine, hyaluronidase, tyramine, histamine, tryptamine, octopamine,taurine, acetylcholine, and dopamine (Source).
The venom is produced by bacteria in the salivary gland and happily there is no cure. So after you’ve been bitten, when you stop breathing and your hear stops beating, you better hope that your friends are good enough to manually respirate you until you get to hospital and/or metabolize all those words out.
There is always the fact that you need never touch one. Or poke it.