What is the most widely kept fish in aquaponics?

Tilapia is the most widely kept fish in aquaponics, where fish farming and hydroponic plant cultivation operate as one connected system. Fish waste supplies nutrients for plants, while the plants and beneficial bacteria help clean the water.

Tilapia became the standard aquaponics fish because it grows quickly, tolerates crowding, accepts many feeds, and can handle fluctuations in water quality better than many more delicate species. It also reproduces readily and is valuable as a food fish, making it useful for systems designed to produce both vegetables and protein.

The name “tilapia” does not refer to one species. It is a common name covering numerous African and Middle Eastern cichlids, with Nile tilapia (Oreochromis niloticus) among the most important farmed species. Different farms may use hybrids or other tilapia varieties.

Goldfish, koi, carp, catfish, trout, and bass can also live in aquaponics systems. Goldfish are popular in ornamental setups, while trout suit cooler water. Tilapia’s warm-water preferences mean they may require heating in cold climates.