Mozambique tilapia

Quick facts

Adult size

30 cm, 500 g typical harvest weight

Days to harvest

240 to 365 days from fingerling

Lifespan (max)

up to 11 years

Diet

omnivore

Temperature class

warm-water

Difficulty

beginner

Water parameters

Temperature range

18–35°C (optimum 28°C)

pH

6.5 to 9

Hardness

5 to 30 dGH

Minimum tank

200 L per individual at harvest size

Feed and growth

Feed protein

30% target

Daily feed (warm water)

1.50% of body weight per day

Daily feed (cool water)

0.80% of body weight per day

Max stocking density

55 g per litre of system water

A 500g adult eats about 7.5 g of feed per day at optimum temperature. For a roster of 10 fish at adult size, that's around 75 g of feed daily.

Legality

Aquaculture and possession rules vary by jurisdiction and change over time. This table reflects regulations as of the verified date on each row. Verify with your local fisheries or wildlife authority before stocking.

Jurisdictions not listed here default to "check local regulations". A non-listing is not a green light; rules in your specific county or municipality may apply.

Habitat and origin

Native to freshwater and brackish habitats across southeastern Africa, from the lower Zambezi River south through Mozambique to the Eastern Cape of South Africa. The species (Oreochromis mossambicus) was the first tilapia widely introduced outside Africa for aquaculture and mosquito control, starting in the 1930s-1940s. It has since become one of the most invasive freshwater fish in the world, established across tropical and subtropical regions of every continent except Antarctica. Mozambique tilapia tolerate extreme salinity (surviving in full seawater), temperatures from 10°C to 42°C, low dissolved oxygen, and brackish-to-marine conditions that no other tilapia species matches. Adults reach 30–40 cm and 0.5–1.5 kg. The species has been largely replaced in commercial aquaculture by the faster-growing Nile tilapia, but remains important in subsistence aquaculture and in saline or brackish systems where Nile tilapia can't survive.

Climate and outdoor ponds

Climate classification

tropical (needs warm water year-round)

Outdoor pond zones (USDA)

10 to 13 (winter low around -1°C or warmer)

Heating in a temperate climate

Required for year-round operation

Cooling in a temperate climate

Not required

Zone bounds reflect year-round outdoor pond viability with no active heating. Anywhere outside the bounded zone, the species can still be kept in an indoor heated tank or a seasonally-managed system. Verify your specific microclimate, as a sheltered yard zone can run a half-zone warmer than the regional rating.

Care notes

A tilapia species for aquaponics in situations where extreme environmental tolerance is needed, particularly salinity tolerance. Mozambique tilapia thrive in brackish water (up to full seawater), which makes them the only practical tilapia for aquaponics integrated with salt-tolerant plants or in regions where only brackish water is available. Growth is slower than Nile tilapia: 300–500 g in 9-12 months on commercial pellet (28-32% protein). FCR is 1.6-2.2, less efficient than Nile tilapia. They breed even more prolifically than Nile tilapia, with females producing broods every 3-4 weeks in warm water, which exacerbates the overpopulation problem. All-male populations or aggressive culling of fry are necessary for growth-focused production. Temperature tolerance is the widest of any tilapia: they feed at temperatures as low as 15°C and survive brief periods at 10°C. For freshwater aquaponics in warm climates, Nile tilapia is the better choice (faster growth, better FCR). Mozambique tilapia is the fallback for brackish systems, extremely hot climates (they tolerate 40°C+), or situations where Nile tilapia is unavailable. Fingerlings are widely available in tropical regions. Heavily regulated in many jurisdictions due to invasive potential.

Further reading

• Fish for aquaponics: tilapia vs everything else