https://ourworldindata.org/data-insights/almost-all-livestock-in-the-united-states-is-factory-farmed
Estimates are still quite high globally too. Around 94% of all globally farmed animals are factory farmed. 74% of all farmed land animals are factory farmed and virtually all farmed fish
There's not really much crab farming in the US in general. It's basically all wild caught which has it's own negatives to the environment like overfishing. It's more of a thing in other parts of the world like South East Asia
Still at fairly high densities from what I can tell though not necessarily always as insane as the photos I showed earlier