A cool story recently surfaced about octopuses that have venom that works at 0°C, far too cold for typical venoms. The results of the study about these octopodes were published in a journal called Toxicon, which is a pretty awesome journal name if I do say so myself. Another fun thing about this research is that it brought four new octopus species into our mollusk menagerie. I hope they get some really sinister species names.
I did an image search to see what comes up for “sinister octopus.” Really, I should have been able to guess.