Fish farmers engage in the business of producing, propagating, transporting, processing, and selling farm-raised fish or shellfish. The fish crop is cultivated in a private pond, vat, or other structure capable of holding fish in confinement wholly within an enclosed, assigned parcel of property. Farmers assist the fertilization and incubation of eggs, regulate and monitor the holding tank environment, provide nutritious feeds to the fingerlings, and prepare the crop for market. The Texas Department of Agriculture licenses and regulates fish farmers and their operations.