Fish · Tilapia
Nile tilapia in Florida aquaponics
Oreochromis niloticus
Nile tilapia is by far the most farmed tilapia outside Africa and the fish behind the best-known aquaponics trials, where it grew fast and almost all survived. Florida treats it like blue tilapia: home growers need no permit in four of FWC's five regions, but the Northwest region (the panhandle from Escambia east to Jefferson) is different. It handles cold less well than blue tilapia, so winter water temperature is the main thing to plan for.1, 2, 3, 4
Where in Florida it works1, 4, 6
Our reading, not a source statement: Nile tilapia stop feeding below 63 F (SRAC 283) and die at about 50 F (SRAC 282), a few degrees sooner than blue tilapia. North Florida freezes most winters, so an unheated outdoor tank is likely to pass those limits; plan on an indoor, covered or heated system. In Central Florida, watch your own winter water temperatures: below 63 F growth stops, and near 50 F the fish are at risk. Tropical South Florida suits them best, though growth slows in cool months. The panhandle counties in FWC's Northwest region carry their own permit rule (see Florida rules).
Our reading of the temperature facts below against UF/IFAS's three regions (North Florida north of State Road 40, Central between 40 and 70, South below 70). A tank with a heater, a greenhouse or a shaded sump changes the answer.
Temperature1, 4
| Optimal water temperature (°F) | 85 to 88 (SRAC 283, tilapia in general); 81 to 84 (SRAC 282, tilapia in general) |
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| Growth slows or stops below (°F) | 63 (feeding stops; SRAC 283, tilapia in general) |
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| Lethal low (°F) | about 50 (SRAC 282); 50 to 52 if held a few days (SRAC 283, most tilapia species) |
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SRAC 282 says Nile tilapia survive down to about 50 F, while blue tilapia go to about 45 F, and that water at 50 to 60 F stresses tilapia, cuts feeding and invites disease. SRAC 283 adds that tilapia grow about three times faster at 85 to 88 F than at 72 F, stop feeding below 63 F, suffer disease losses if handled below 65 F, and do not breed below 68 F. No fetched source describes overwintering Nile tilapia in Florida.
Florida rules2, 5, 6, 7, 8, 9, 10
| FWC status | FWC lists Oreochromis niloticus (Nile tilapia) on its "Conditional Nonnative Species List". FWC's aquaponics page sets a regional rule for blue and Nile tilapia and their hybrids: "No permit is needed to possess blue and Nile tilapia in the Northeast, North Central, South, and Southwest FWC regions" and "A conditional species permit is required to possess blue and Nile tilapia in the Northwest region." FWC's regional office page puts Escambia, Santa Rosa, Okaloosa, Walton, Holmes, Washington, Bay, Jackson, Calhoun, Gulf, Liberty, Franklin, Leon, Wakulla, Jefferson and Gadsden counties in the Northwest region. None of these FWC pages shows a revision date; all were read 2026-11-02. |
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| Permit or certificate | Home system outside the Northwest region: none, if the fish stay at home. FWC: "No permit needed if aquatic species are produced for personal use only (not sold) and acquired in Florida." Home system in the Northwest region: FWC requires a conditional species permit there, and the same page says "Conditional species permits are not issued for personal use"; read together, these leave a home grower in the Northwest region with no permit route (our reading of two FWC sentences, not an FWC ruling; confirm with FWC). Commercial: an FDACS Aquaculture Certificate of Registration. FDACS-P-01770 (Rev. 12/25) says blue tilapia, Nile tilapia and their hybrids "may be possessed, transported and cultured without a special permit in four FWC designated regions: North Central, Northeast, South and Southwest"; the FDACS Food Fish page adds that in the Northwest region "a Restricted Species Authorization is still required." |
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| Selling fish or fingerlings | FWC's aquaponics page says production and sale of aquatic animals "by commercial businesses or private individuals" needs an Aquaculture Certificate of Registration from the FDACS Division of Aquaculture, a "Resident fish dealer's license (RFD) issued by FWC if selling live fish to the public", and a food permit from the FDACS Division of Food Safety "if selling products for human consumption". FDACS-P-01770 (Rev. 12/25) says certified facilities must follow the Aquaculture Best Management Practices. |
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| Also | Never release fish: FWC says "It's illegal to release any nonnative species in Florida." Buying fish from out of state needs an FWC "Resident Fish Dealer's license if purchasing fish from sellers outside Florida". One FWC page reads differently: the spotted tilapia profile says "Possession and transport of live tilapia in Florida is illegal without a special permit (except blue tilapia)", which leaves Nile tilapia out; the aquaponics page and FDACS-P-01770 both name Nile tilapia alongside blue, so the record follows them. The BMP manual (FDACS-02034 Rev. 11/2023) words the exemption as "in all counties east of Jefferson County". |
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Rules change and this is a summary; the agency page in the sources is the authority. Check it before you buy, breed or sell.
Growing1, 3, 4, 11
| Harvest size | about 1.8 lb on average (813.8 g) after 24 weeks in the UVI aquaponic system (SRAC 454); about 1.5 lb for the U.S. live market, with 0.75 to 2.0 lb accepted in some areas (SRAC 282) |
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| Months to harvest | 24 weeks from 79 g fingerlings in the UVI aquaponic system (SRAC 454); all-male tilapia in warm ponds reach about 1 lb in 5 to 6 months and 1.5 lb in 8 to 9 (SRAC 283) |
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| Stocking | In the UVI aquaponic system, all-male Nile tilapia were stocked at 0.29 fish per gallon (77 per cubic metre) and harvested at 0.51 lb per gallon (61.5 kg/m3), growing 4.4 g a day with 98.3 percent survival and a feed conversion ratio of 1.7 (SRAC 454, Table 1). For small home systems SRAC 5007 gives about 1 lb of fish per 10 gallons at harvest as a common final density for new growers. |
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| Feed | Floating pellets of 28 to 36 percent crude protein, at 2 to 4 oz a day per 10 sq ft of raft plants (SRAC 5007); SRAC 454 uses 60 to 100 g of feed per square metre of raft per day. Tank finishing feeds run 32 to 40 percent protein, fed at about 1.0 to 1.5 percent of body weight a day for market-size fish (SRAC 282). These are tilapia-wide figures. |
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| Water quality | SRAC 282 tank guidelines: dissolved oxygen 5.0 to 7.5 mg/L; un-ionized ammonia below 1.0 mg/L; nitrite-nitrogen below 5 mg/L when chloride is low, with chloride at 150 to 200 mg/L; carbon dioxide below 40 mg/L. Tilapia survive pH 5 to 10 and do best at 6 to 9 (SRAC 283); for aquaponics SRAC 5007 recommends pH 6.5 to 7.5. Nile tilapia are the least salt-tolerant of the farmed tilapias but grow well up to 15 ppt (SRAC 283). |
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SRAC 283 says more than 90 percent of farmed tilapia outside Africa are Nile tilapia, and that the species was farmed in Egypt more than 3,000 years ago. Nile tilapia have strong vertical bands on the tail fin, which helps tell them from blue (interrupted bands) and Mozambique (weak or no bands) (SRAC 283).
Breeding and stock1, 2, 3, 11, 12
| How it breeds | The female broods eggs and fry in her mouth after spawning in a nest the male digs (SRAC 283). In farm ponds Nile tilapia mature at 5 to 6 months and 5 to 7 oz (150 to 200 g); stunted fish may spawn under 1 oz (SRAC 283). Warmth matters: half-pound Nile females gave about 600 fry each at 82 F but only 250 at 75 F (SRAC 283). Tank hatcheries use 4 or 5 females per male, or 2 females per male in floating net pens (SRAC 282). Nile females crossed with blue males give mostly male young (SRAC 283, CIR1051), though SRAC 282 says this cross is not widely used in U.S. production. Hormone sex reversal of fry needs a special federal permit, and YY-male broodstock is a patented, licensed method (SRAC 282). |
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| Getting fingerlings or stock | For a home system, FWC waives the permit only for fish "acquired in Florida"; buying from sellers outside the state needs a Resident Fish Dealer's license (FWC aquaponics page). Ask for all-male fish (SRAC 5007) and for the species by name, since tilapia species interbreed and are hard to tell apart (SRAC 283). |
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Florida sellers of fingerlings, breeders and stock
In an aquaponics system3, 11
well suited
SRAC 454 reports measured results for all-male Nile tilapia in the University of the Virgin Islands raft system: a 24-week cycle in four staggered tanks, one harvested every 6 weeks, about 9,152 lb of fish a year per system, 98.3 percent survival and a feed conversion ratio of 1.7. SRAC 5007 says tilapia generally do well in aquaponics but grow slowly below 68 F. The FAO aquaponics manual could not be fetched.
On the table1, 4
SRAC 283 says consumers like tilapia's firm flesh and mild flavor, and that whole-dressed fish (head off) yield 51 to 53 percent of live weight and fillets 32 to 35 percent. Fish from recirculating systems can taste off; holding back feed for 3 to 5 days before harvest is common (SRAC 282).
What this page doesn't cover yet
- No fetched source gives a lethal high temperature for tilapia.
- Optimal temperature and feeding-stop figures are for tilapia in general; only the lethal low (SRAC 282) is given for Nile tilapia by name.
- Two FWC pages disagree: the spotted tilapia profile says live tilapia need a special permit 'except blue tilapia', while the FWC aquaponics page lets home growers keep Nile tilapia without a permit outside the Northwest region. The aquaponics page and FDACS-P-01770 agree with each other and are followed here; confirm with FWC.
- The harvest size of about 1.8 lb is our conversion of the 813.8 g average in SRAC 454, Table 1.
- The FAO manual 'Small-scale aquaponic food production' refused the fetch (HTTP 403); its tilapia pages were not used.
- The FDACS Aquaculture Certificate of Registration page (fdacs.gov) returned only site navigation; certificate details come from FDACS fact sheets and the FWC aquaponics page.
- No fetched source describes overwintering Nile tilapia in Florida.
Sources
- Tilapia: Life History and Biology. Southern Regional Aquaculture Center (SRAC), SRAC 283. Read 2026-11-02.
- Aquaponics Licenses & Permits. Florida Fish and Wildlife Conservation Commission. Read 2026-11-02.
- Recirculating Aquaculture Tank Production Systems: Aquaponics—Integrating Fish and Plant Culture. Southern Regional Aquaculture Center (SRAC), SRAC 454. Read 2026-11-02.
- Tank Culture of Tilapia (revision June 2009). Southern Regional Aquaculture Center (SRAC), SRAC 282. Read 2026-11-02.
- Conditional Nonnative Species List. Florida Fish and Wildlife Conservation Commission. Read 2026-11-02.
- Regional Office Contacts. Florida Fish and Wildlife Conservation Commission. Read 2026-11-02.
- Commercial Aquaponics: Rules and Regulations. Florida Department of Agriculture and Consumer Services, Division of Aquaculture, FDACS-P-01770 Rev. 12/25. Read 2026-11-02.
- Food Fish. Florida Department of Agriculture and Consumer Services, Division of Aquaculture. Read 2026-11-02.
- Aquaculture Best Management Practices Manual. Florida Department of Agriculture and Consumer Services, Division of Aquaculture, FDACS-02034 Rev. 11/2023 (Rule 5L-3.004, F.A.C.). Read 2026-11-02.
- Spotted Tilapia (species profile). Florida Fish and Wildlife Conservation Commission. Read 2026-11-02.
- Principles of Small-Scale Aquaponics (September 2015). Southern Regional Aquaculture Center (SRAC), SRAC 5007. Read 2026-11-02.
- Culture of Hybrid Tilapia: A Reference Profile. UF/IFAS Extension, EDIS, CIR1051 (FA012). Read 2026-11-02.
Every fact above is restated in our own words from these documents, written 2026-11-02. Independent of the University of Florida and of every agency named.