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Breeding / Egg scatterers
Zebra otocinclus
Egg scatterers · Moderate

Breeding the zebra otocinclus

Has been bred in aquaria, but very few details are recorded. The fry are presumably tiny and need plenty of algae. Most fish sold are wild-caught.

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
Setup blueprint

Home setup

One breeding tank for the zebra otocinclus, drawn to scale from the breeding guide.

50 cm long · 25 cm deep30 cm1234
  1. 1
    Breeding tank: 40 L · about 50 × 25 × 30 cm, 40 L from the breeding guide
  2. 2
    Sponge filter and air pump · gentle and safe for eggs and fry
  3. 3
    Heater, 21–25 °C · this species' normal range
  4. 4
    Plants for cover · named in the guide

Water: 21–25 °C · pH 6–7.5 · sand bottom

A plan from the breeding guide and an adult size of 4.5 cm. Tank shape is a standard 2 : 1 : 1.2 box, at least 6 adult lengths long. Check each step in the guide above.

Setup blueprint

Business setup

A 120 cm rack for breeding the zebra otocinclus in numbers.

12234120 cm rack, 3 shelves
  1. 1
    2 breeding tanks, 40 L each · about 50 × 25 × 30 cm, set up like the home tank
  2. 2
    2 grow-out tanks, 80 L each · about 65 × 30 × 40 cm; twice the breeding tank, never smaller than this species' smallest tank
  3. 3
    Shared air pump and air line · one line along each shelf feeds a sponge filter in every tank
  4. 4
    Heat the room or each tank · 21–25 °C

In total: 4 tanks, about 240 L of water. A litre of water weighs about 1 kg, so check that the floor and rack can take the weight.

Sizes are worked out from the breeding tank in the guide. Tanks fit a standard 120 cm rack when they can; bigger tanks go on their own stands.

Male or female

Adult males are 5-10 mm smaller than females and have a conical urogenital papilla behind the anus, which females lack. Males also have a flap on the top of the first pectoral-fin ray. Females look fuller.

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.