First post on the forum so be gentle.
TL;DR: The Spanish company Nueva Pescanova is planning to farm octopus and begin selling it on the market in 2023. They intend to sell 3,000 tons of farmed octopus per year, which amounts to several hundred thousand octopuses. This is concerning given that octopuses are highly intelligent animals; there are no released standards for how the octopuses are going to be kept and raised, nor for how they will be slaughtered. There doesn't seem to be much in the way of coordinated action against this yet.
Link to the article: https://www.bbc.com/news/science-environment-59667645
https://en.wikipedia.org/wiki/Cephalopod_intelligence
I am not an expert on animal intelligence, but octopuses seem as or more intelligent than monkeys from my limited understanding. They aren't proven as intelligent as the great apes--none have been taught a human language that I know of--but might have languages of their own, and considering their other feats I would be mildly surprised if there aren't at least several species which could learn a sign language which doesn't take hands.