Fish farming can be a useful agribusiness in Nigeria, but it is not automatically profitable.
Before you build a pond or buy fingerlings, answer three questions:
- What fish will I raise?
- Where will I get reliable water?
- Who will buy the fish, and at what size?
Start with the market, the water and the numbers; do not start with the pond.
What is fish farming?
Fish farming is the controlled raising of fish for sale, food, breeding or further production.
In Nigeria, common farmed species include catfish and tilapia. The best species for a farm depends on the market, water, production system, feed availability and farmer experience.
1. Decide what fish business you want
You may choose to produce:
- table size catfish;
- table size tilapia;
- fingerlings or juveniles;
- smoked fish;
- breeding stock; or
- a combination of these.
Each business has different skills, risks and cash flow.
For example, growing catfish to market size is different from running a hatchery. A hatchery requires tighter control of broodstock, water quality, spawning, larval care and seed quality.
2. Study the market before stocking
Do not assume that fish will sell simply because people eat fish.
Talk to actual buyers and ask:
- which species they prefer;
- what size they buy;
- whether they buy live, fresh or smoked fish;
- how often they buy;
- how they determine price;
- whether they collect from the farm or expect delivery; and
- how quickly they pay.
Your market should influence the species, stocking plan and harvest size.
3. Choose the species that fits your market
Catfish and tilapia are among the most common choices for Nigerian farmers.
Catfish
Catfish is popular because it has a strong market in many areas and can be raised in several systems.
But catfish still requires good seed, clean water, proper feeding, grading where necessary, health monitoring and careful stocking.
Tilapia
Tilapia can also be a good production option, especially where the local market accepts it well.
Farmers need to manage reproduction carefully because mixed sex tilapia can breed inside the production system and create too many small fish.
If you are considering monosex tilapia, see our guide to choosing quality monosex tilapia fingerlings.
4. Water comes before fish
Water quality is one of the biggest factors in fish farming.
Before stocking, check whether your water source is reliable throughout the production cycle.
Important things to watch include:
- water availability;
- temperature;
- dissolved oxygen;
- pH;
- ammonia;
- water colour;
- smell;
- flow or exchange rate; and
- possible contamination from chemicals, sewage or runoff.
Fish can stop feeding, grow slowly or die when water quality becomes poor.
5. A borehole is useful, but it is not the only possible water source
Some farms use boreholes, some use wells, springs, rivers or other safe water sources.
The important question is not simply, “Do I have a borehole?”
The real question is, “Can this water source supply enough safe water for the number of fish I plan to raise?”
A reservoir can be useful where water needs to be stored before entering the production system.
6. Choose the production system that fits your site and budget
Common systems include:
- earthen ponds;
- concrete ponds;
- tarpaulin ponds;
- plastic tanks;
- flow through systems;
- recirculating systems; and
- cages where the location and regulations allow them.
No pond type is best for every farmer.
Choose based on:
- water availability;
- soil type;
- space;
- capital;
- management skill;
- stocking level;
- drainage;
- electricity needs; and
- how easily fish can be harvested.
7. Do not overstock
Putting more fish into a pond does not automatically mean more profit.
Too many fish can lead to:
- low oxygen;
- slow growth;
- more competition for feed;
- dirty water;
- higher disease pressure;
- uneven sizes; and
- higher mortality.
Stocking density should match the species, pond type, aeration, water exchange and management level.
For tilapia, use our Tilapia Stocking Density guide.
8. Buy seed from a reliable hatchery
Quality fingerlings or juveniles give the farm a better starting point.
Check:
- size uniformity;
- active swimming;
- body shape;
- injury;
- mortality during transport;
- hatchery reputation;
- species identity; and
- health history where available.
Do not buy because the seed is cheap.
Poor quality seed can produce slow growth and uneven harvests.
9. Fingerlings or juveniles: which is better for a beginner?
There is no one answer for every farm.
Fingerlings are smaller and may cost less per fish, but they need careful early management.
Juveniles are larger and may be easier for a beginner to manage, but they usually cost more.
The better choice depends on your skill, budget, survival rate and production plan.
10. Feeding is one of the biggest costs
Feed quality and feeding management have a major effect on growth and profit.
Do not judge fish feed only by bag price.
Record:
- feed purchased;
- feed used;
- fish weight;
- mortality;
- days on feed; and
- harvest weight.
A cheaper feed can become expensive if fish grow slowly or need more feed to reach market size.
11. Feed the fish, but also watch how they respond
Healthy fish often show interest in feed.
If fish suddenly stop feeding, do not keep throwing feed into the pond.
Check:
- water quality;
- oxygen;
- temperature;
- disease signs;
- recent weather;
- feed condition; and
- whether mortality is increasing.
Uneaten feed can worsen water quality.
12. Weigh fish during the production cycle
Do not wait until harvest before checking growth.
Sample the fish periodically and record average weight.
This helps you estimate:
- growth rate;
- feed requirement;
- expected harvest time;
- size variation; and
- whether the fish are meeting your production target.
13. Watch fish behaviour every day
Fish behaviour can tell you that something is wrong before mortality becomes serious.
Watch for:
- gasping at the surface;
- poor feeding;
- unusual swimming;
- fish staying near water inlets;
- skin damage;
- swollen body;
- fin damage;
- sudden colour change; and
- dead fish.
One sign alone may not tell you the cause, but sudden change should be investigated quickly.
14. Water quality problems can look like disease
Fish gasping at the surface may have an oxygen problem, not an infectious disease.
Poor water quality can also weaken fish and make disease more likely.
That is why water should be checked before using medicine blindly.
15. Remove dead fish quickly
Dead fish should not remain in the pond.
Remove them, record the mortality and investigate the cause if deaths continue.
A rising mortality pattern is more useful to the farmer than simply saying, “Some fish died.”
16. Protect the farm from theft and predators
Security is part of fish farming.
Possible problems include:
- theft;
- birds;
- snakes;
- frogs in hatchery systems;
- unauthorised harvesting; and
- damage to tanks or ponds.
Good fencing, lighting, staff control and harvest records can reduce losses.
17. Keep production records
At minimum, record:
- stocking date;
- number stocked;
- source of seed;
- feed used;
- sampling weights;
- mortality;
- water problems;
- treatments;
- harvest quantity;
- sales; and
- expenses.
Without records, it is easy to think the farm made money because fish were sold while forgetting feed, water, electricity, labour and mortality.
18. Plan harvest before the fish are ready
Do not wait until the fish reach market size before looking for buyers.
Speak to buyers early.
Know:
- preferred fish size;
- quantity they can take;
- price method;
- delivery arrangement;
- payment method; and
- whether the fish will be sold live, fresh or processed.
19. Processing can create another market
Some farmers sell smoked or processed fish instead of selling everything live.
This can open another market, but it also creates new requirements for:
- hygiene;
- processing equipment;
- fuel;
- packaging;
- storage;
- food safety; and
- customer demand.
20. Register the business when your structure requires it
If you are operating as a formal business, supplying organisations, opening business accounts or building a larger commercial operation, business registration may be necessary.
Do not treat registration itself as proof that the farm will be profitable. The production system still has to work.
21. Train before scaling
Fish farming looks simple from outside because the fish are under water.
In reality, farmers need to understand:
- water quality;
- stocking;
- feeding;
- sampling;
- health;
- harvesting;
- records; and
- market planning.
Start with a manageable number so that mistakes do not become expensive.
Common mistakes new fish farmers make
- Building ponds before checking the market.
- Stocking more fish than the system can carry.
- Buying cheap seed from an unknown source.
- Ignoring water quality.
- Overfeeding when fish stop eating.
- Keeping no records.
- Waiting until harvest to look for buyers.
- Using medicine before checking water and management.
- Starting too large before learning the system.
Simple fish farm startup checklist
- Species chosen.
- Market checked.
- Budget completed.
- Water source confirmed.
- Production system selected.
- Drainage and waste water plan ready.
- Fingerling or juvenile source checked.
- Feed supply confirmed.
- Stocking plan ready.
- Record system prepared.
- Security plan in place.
- Buyer contacts started.
Bottom line
Fish farming can work in Nigeria, but profit depends on water, seed quality, feed, stocking, survival, growth, market price and management.
The pond itself does not make money. The production system does.
Know your water, know your fish, know your market and keep your records.
