It really depends. The Hawaiians farmed fish several hundred years ago. They built structures (loko i'a) that encouraged certain fishes to congregate and fed/

It really depends. The Hawaiians farmed fish several hundred years ago. They built structures (loko i'a) that encouraged certain fishes to congregate and fed/protected them. The caveat is that the fish primarily ate algae and plankton so it is considerably easier to feed the fish.