As with everything, it depends. https://www.seafoodwatch.org/seafood-recommendations/groups/octopus?o=158579988,1386140647 https://www.seafoodwatch.org/seafood

As with everything, it depends. https://www.seafoodwatch.org/seafood-recommendations/groups/octopus?o=158579988,1386140647 https://www.seafoodwatch.org/seafood-recommendations/groups/... http://seafood.edf.org/octopus http://seafood.edf.org/octopus There are sustainable and unsustainable sources. The same is true of all seafood. The life expectancy of octopus is generally between 3-5 years, some live as little as 6 months. The extent of their intelligence is unclear. At most we have evidence that they have the capacity for long and short term memory. Given the standard of intelligence for animals cultures otherwise consume, this doesn't seem remarkable at all. To chase the ethical argument to it's logical end, as one of intelligence is purported, the only ethical animal then to consume is a non-sentient one.