When I lived in the US, and I’d buy a pack of frozen shrimp, more often than not it came from Thailand. That astounded me as Thailand is about as far as one can go to get shrimp. Even with freezing, there is a time factor involved. There are both US and US adjacent/proximal producers of shrimp, but Thailand is still a low-cost producer for US markets even with transportation costs figured in.
It’s interesting to be in a place were prices for a shrimp dish are the same as for pork or beef, and sometimes even the same as for chicken.
From Phuket you can see the fleets of fishing trawlers working it all day long.