Which fish is best to farm in Kenya — tilapia or catfish?

Tilapia (Nile tilapia) is the most popular and marketable farmed fish in Kenya, enjoying strong demand and good prices. African catfish grows faster, tolerates poor water and low oxygen, and is often farmed alongside tilapia (polyculture) to control breeding and add income. Many farmers keep both.

How long does it take to grow fish to market size in Kenya?

With quality fingerlings and good feeding, tilapia reach a market size of around 250–400 g in about 6–8 months, and catfish reach 0.8–1.5 kg in roughly 5–8 months. Water quality, feed quality and stocking density strongly affect how fast they grow.

Is fish farming profitable in Kenya?

Yes, when managed well. Fish demand in Kenya outstrips local supply, especially as wild catches decline. Profit depends on stocking quality fingerlings, feeding good-quality feed (the biggest cost), maintaining water quality, and selling into strong markets. Poor feed and overstocking are the main causes of losses.

How much does it cost to start fish farming in Kenya?

An earthen pond of about 300 m² can cost roughly KES 30,000–80,000 to construct, or more if lined with a dam liner. Fingerlings cost around KES 5–15 each, and feed is the largest running cost. Starting with one well-built pond keeps entry costs manageable.

What kind of pond should I build — earthen or lined?

Earthen ponds are cheaper and suit soils that hold water well (good clay content). Lined ponds (using dam liners) or tanks suit sandy or leaky soils, rocky ground or small spaces, and give better control over water and harvesting though at higher cost. Choose based on your soil and budget.

Where can I sell fish in Kenya?

Sell to households and neighbours, local markets and fishmongers, hotels and restaurants, institutions, and bulk buyers or processors. Demand is strong in towns and around urban centres. Harvesting to order and selling fresh fetches the best prices; some farmers add value by smoking or filleting.

Fish Farming in Kenya: Tilapia, Catfish, Ponds and Markets

Fish farming (aquaculture) in Kenya is a fast-growing enterprise driven by strong, unmet demand for fish. As wild catches from lakes and rivers decline, farmed fish — especially tilapia and catfish — fill the gap, and prices are attractive across Kenyan towns and cities. With a well-built pond, quality fingerlings, good feed and clean water, a smallholder can turn a modest plot into a reliable protein and cash source. This guide covers species, pond types, fingerlings, feeding, water management, harvesting and markets.

Why fish farming is growing in Kenya

Demand for fish in Kenya outstrips local supply, and the gap widens as wild stocks shrink. Fish farming needs relatively little land, uses water productively, and offers a fast turnaround compared with many livestock enterprises. With the right management, one pond can produce hundreds of kilos of fish in a single cycle.

Choosing your species

Nile tilapia

The most popular and marketable farmed fish in Kenya. Good taste, strong demand and firm prices. The catch: tilapia breed readily, so uncontrolled breeding causes overcrowding and stunting. The fix is mono-sex (all-male) fingerlings, which grow uniformly to market size.

African catfish

Fast-growing, hardy and tolerant of low oxygen and poor water. Reaches large sizes and is often kept with tilapia (polyculture), where catfish eat surplus tilapia fry and help control breeding while adding their own income.

Polyculture

Keeping tilapia and catfish together is a common, practical strategy in Kenya — it controls tilapia breeding and diversifies income.

Pond types: earthen vs lined

Earthen ponds

Cheaper and well suited to soils with good clay content that hold water. They support natural food (plankton) when fertilised, but leak in sandy or rocky ground.

Lined ponds and tanks

Built with dam liners or as tanks, these suit sandy, leaky or rocky soils, small spaces and urban plots. They give better control over water and harvesting but cost more upfront.

Choose based on your soil, water supply and budget. A useful starting size is 200–300 m² at 1–1.5 m depth, with a reliable clean water source and proper inlet and outlet.

Preparing an earthen pond

Before stocking: dry the pond, apply lime to correct acidity and disinfect, then fertilise (manure or agricultural fertiliser) to grow natural plankton food. This head start boosts early growth and cuts feed costs.

Fingerlings

Buy healthy, uniform fingerlings from certified hatcheries — quality here sets the ceiling on your yields
For tilapia, insist on mono-sex (all-male) fingerlings to prevent breeding and stunting
Stock at recommended densities — overstocking slows growth and crashes water quality
Acclimatise fingerlings gently before releasing them

Fingerlings typically cost KES 5–15 each.

Feeding

Feed is the largest running cost and the biggest driver of profit or loss:

Use good-quality commercial pellets, sized to the fish
Feed 2–3 times a day at the recommended percentage of body weight
Avoid overfeeding — uneaten feed fouls the water and wastes money
Adjust rations as the fish grow

Cheap, poor feed produces slow, uneven growth; quality feed pays for itself in shorter cycles.

Water quality management

Water quality decides survival and growth:

Oxygen: watch for fish gasping at the surface at dawn (low oxygen) — a warning sign
Cleanliness: control algae blooms and exchange or top up water as needed
Avoid overstocking and overfeeding, the two main causes of poor water
Keep predators (birds, frogs, snakes) out with netting where possible

Growth, harvesting and yields

Species	Market size	Time to market
Nile tilapia (mono-sex)	250–400 g	~6–8 months
African catfish	0.8–1.5 kg	~5–8 months

Indicative under good management; water, feed and stocking density strongly affect outcomes.

Sample fish periodically to track growth, then harvest by seine netting or draining when they reach market size. Harvesting to order keeps fish fresh and commands the best price.

Indicative economics (one 300 m² tilapia pond)

Item	Indicative figure (KES)
Pond construction (earthen)	30,000–80,000 (one-off)
Mono-sex fingerlings (~1,000)	5,000–15,000
Feed (per cycle)	40,000–90,000
Lime, fertiliser, misc.	3,000–8,000
Harvest (~250–400 kg)	100,000–200,000

Indicative 2025/2026 ranges; feed prices, survival and market price vary — confirm current rates before budgeting.

The pond is a one-off cost spread over many cycles, so from the second cycle onward margins improve markedly.

Markets: where and how to sell fish

Fish sells fast in Kenya because demand is high:

Households and neighbours: fresh fish sells readily locally
Local markets and fishmongers: steady outlets
Hotels, restaurants and institutions: pay well for consistent supply and size
Bulk buyers and processors: for larger volumes
Value addition: smoking or filleting lifts prices and shelf life

Sell fresh and to order for the best returns. Compare prevailing prices on Agrisoko's market intelligence hub before harvesting so you time sales and price your fish well.

Common mistakes to avoid

Poor-quality or mixed-sex fingerlings: stunted, uneven fish and, with tilapia, uncontrolled breeding that crashes the pond
Cheap feed: slow, uneven growth that lengthens the cycle and eats profit — feed is where fish farming is won or lost
Overstocking: too many fish crash oxygen and water quality and stunt everyone
Overfeeding: uneaten feed rots, fouls water and wastes money
Ignoring water: low oxygen (fish gasping at dawn) and algae blooms kill fish fast if not managed
No predator control: birds, frogs and snakes quietly reduce your harvest

Health and biosecurity

Most fish disease in Kenyan ponds traces back to poor water quality, overstocking and stress rather than to a specific pathogen — so prevention is mostly good management. Keep water clean and well-oxygenated, avoid overfeeding, and do not overstock. Watch for warning signs: fish gasping at the surface, off feed, discoloured, or with sores or fungus. Isolate or remove sick and dead fish promptly, avoid introducing fish from unknown sources, and disinfect nets and equipment between ponds. Sourcing fingerlings only from certified hatcheries is itself a biosecurity measure, keeping disease out from the start.

Get started with Agrisoko

Fish farming rewards Kenyan farmers who build a good pond, stock quality mono-sex fingerlings, feed well and keep water clean. With demand outstripping supply, well-managed tilapia and catfish are a reliable source of protein and income. Ready to buy fingerlings, feeds, dam liners and aquaculture inputs, or reach fish buyers? Check current rates on our market intelligence pages and list your fish and pond produce for sale on Agrisoko to reach buyers across Kenya.