The collective noun for a group of octopuses, in case you were wondering, is a consortium – not, as some wags might tell you, a seafood buffet.
I don’t eat octopus, and have made a lot of noise about why: they’re as smart as parrots, their brain is spread over their arms, they are many millions of years older than us – don’t you know that, and of all the species on Earth, only they and