fish farms line icons and signs. ponds, fish-rearing, trout, tilapia, koi, catfish, carp, sturgeon outline

aquaculture ponds fishrearing trout tilapia koi catfish carp sturgeon breeding farming hatcheries tanks algae larvae feeds oxygenation aeration fishmeal recirculating systems harvesting pressure water raft cage flow aquaponics lakes polyculture lagoons raceways sharks filter nets baffles boats traps mimicking wild regulating icon vector line