Managing Catfish Hatcheries: From Eggs to Fingerlings

Selling fingerlings (young fish a few weeks old) can earn more than growing fish to table size, but a hatchery is a business that needs care and accuracy — small mistakes at the egg and fry (newly hatched baby fish) stage quickly grow into big losses. Here's the process from broodstock (parent fish kept for breeding) to fingerlings ready to sell.

1. Broodstock care

Keep selected male and female catfish well-fed and healthy, and keep them separately while you feed them up. Mature, healthy broodstock is the foundation of every good batch — weak parents give weak fry.

2. Induced breeding (using an injection to make the fish breed)

Catfish don't breed readily in tanks, so hatcheries use a hormone injection to trigger breeding. The female is gently squeezed so her eggs come out, and the eggs are fertilised with milt (sperm) from the male. This step needs training — work with an experienced hatchery the first time.

3. Egg incubation (keeping the eggs safe until they hatch)

Eggs are spread on a clean surface and kept in gently flowing, well-aired water with enough oxygen. They hatch in about 24–48 hours depending on temperature. Remove dead (white) eggs to stop mould from spreading.

4. Raising fry to fingerlings

• First days — fry live off the yolk sac (the food store they carry from the egg), then need fine starter feed or artemia (tiny live shrimp).
• Weaning (moving young fish onto solid feed) — gradually move them onto powdered feed.
• Grading (sorting by size) — sort them regularly; catfish eat their own kind, and bigger fry eat smaller ones.
• Water quality — clean, well-aired water with enough oxygen is everything at this stage.

For the growing-the-fish-to-market-size side of the business, read our catfish farming guide, and keep the whole operation healthy with our fish diseases and pests guide.