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Breeding / Egg scatterers
Denison barb
Egg scatterers · Hard

Breeding the denison barb

Rarely bred in home aquariums; commercial fish are produced on farms, presumably with hormone stimulation. Occasional aquarium spawnings have been reported (e.g. Chester Zoo).

Full species page

Step by step

Pairing

Rarely bred by hobbyists. Buy captive-bred fish from known farms; use a group of 6 or more.

Breeding tank

Large tank (300 L+) with cool, well-oxygenated, flowing water, rocks and plants. Commercial breeders use hormone induction.

What starts it

Strong current and seasonal-like conditions; farms use hormones.

Eggs and young

Up to a few hundred eggs; hatch in about 24-48 hours.

Raising the fry

Feed infusoria and baby brine shrimp, then crushed flakes. Keep water clean and well oxygenated. Fry grow slowly; give plenty of space.

Common mistakes
  • Tank too small
  • Low oxygen
  • Expecting natural spawning at home

Male or female

Adult females grow a little larger, are heavier-bodied and a little less colourful than males.

Can I breed it in my tank?

  • Use a separate small tank with a sponge filter and spawning mops, so the eggs aren't eaten.
  • Hard: for experienced breeders.

Day-by-day plan

Typical for egg scatterers

  1. 14 days beforeCondition the parents

    Feed live or frozen food twice a day. Keep males and females apart if you can.

  2. Day 0Spawning

    Eggs are scattered over mops or fine plants, often at first light. Remove the parents straight after.

  3. Day 1Eggs hatch

    Most eggs hatch in 1–2 days. Keep the tank dim and remove white (fungused) eggs.

  4. Day 4Free swimming, first food

    Fry use up the yolk and start swimming. Feed infusoria or liquid fry food several times a day.

  5. Day 8Baby brine shrimp

    Switch to newly hatched brine shrimp or microworms. Start small, daily water changes.

  6. Day 21Crushed flake

    Add finely crushed flake. Sort fry by size so the big ones don't eat the small ones.

  7. Day 60Ready to move

    Most small fish reach about 2 cm in 2–3 months and can join the main tank.

A general guide for this breeding type. Days change with temperature and species.

Simulator: guided

Stage 1 of 7Condition the parents

Feed live or frozen food twice a day. Keep males and females apart if you can.

Simulator: try it yourself

Set up a virtual breeding tank and see what would likely happen.

No spawning
  • Without live or frozen food the parents aren't in breeding condition.

An educational estimate from the breeding rules, not a promise.