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Breeding / Egg scatterers
Jumbo oto
Egg scatterers · Moderate

Breeding the jumbo oto

Rarely bred; wild-caught fish dominate.

Full species page

Step by step

Pairing

Keep a group with a mix of sexes and feed lots of algae to bring them into condition.

Breeding tank

40 L tank with fine sand, dense plants, some tannins and a gentle current.

What starts it

Cool, fresh water changes and plenty of biofilm and algae feeding.

Eggs and young

Tiny sticky eggs are laid on glass or leaves in small batches; adults do not guard them.

Raising the fry

Fry feed on biofilm and powdered spirulina; very prone to starvation, so keep a mature algae-rich tank.

Common mistakes
  • Feeding too little algae
  • Raising fry in a sterile tank

Male or female

Mature males have much longer pelvic fins, reaching past the start of the anal fin.

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.
  • Takes some experience.

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.