Aquaculture is the culture, or husbandry, of marine or freshwater plants or animals. "Aquatic animals" means all life stages of fish, mollusks, and crustaceans. Aquaculture is undertaken in a variety of ways, including: fish hatcheries, raceways, ponds, or recirculating systems, floating or submersible net pens or cages, and bag, rack, or suspended shellfish culture.