fish hatchery:-
A hatchery is a mix of a laboratory and a farm, where fish are spawned, then hatched and cared for. They remain at the hatchery until they are large enough to be transferred to a fish farm or released into the wild as part of a stock enhancement program.

fish farming:-
Fish farming or pisciculture involves commercial breeding of fish, usually for food, in fish tanks or artificial enclosures such as fish ponds.

fish breeding:-
Fish reproduce by bearing live young or by laying eggs. Livebearers give birth to fully formed and functional young called fry. The eggs are fertilized and hatch within the female.