Well that just ruined the word “bruv” for me.

Please mark your post as NSFW. Cheers.

But the reason he gives for them becoming the dominant species is their intelligence.

I worked as an intern at a lab studying octopus vulgaris.

They are extremely sensitive to all sorts of things in the water. Keeping them well is very difficult. Although I would imagine if there are big but gradual changes in water environment, they would have a chance of adapting faster due to short life cycles and the fact that mating creates hundreds of thousands of eggs.

But they

1. Have extremely short lifespan so a limited capacity to learn (1-2 years)
2. Don’t raise their offspring, in fact after mating/laying eggs they naturally die, so no knowledge sharing
3. Are extremely solitary and don’t have social bonds or do anything socially, so little communication/passing of knowledge