As is chopping down forests to grow palm oil which is in lots of food stuffs, including vegan cheese.
https://thecornishlife.co.uk/10-things-youre-buying-probably-contain-palm-oil/
The more crops that have to be grown, to feed people, the less land there is.
All those chemicals that are needed to spray the crops to keep the insects and pests at bay.
Well, yes. But what has that got to do with the price of fish?