Golden Wonder Killifish

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingEasy tank upkeep

  No grooming here — steady water quality and routine tank care do it.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment3–4 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Skin conditions

The golden wonder killifish is a captive-bred golden strain of Aplocheilus lineatus, a surface-dwelling fish native to the streams, ponds and rice paddies of southern India and Sri Lanka. It grows to about 10 cm and lives 3–4 years. Its metallic gold body and upturned mouth mark it as a specialised top-water predator. Golden wonders need a tank of 75 litres or more at 22–26°C with a pH of 6.0–7.5 and — critically — a tight-fitting lid, because they are powerful jumpers. They spend most of their time near the surface, so floating plants and open top-water suit them, along with subdued lighting to show off their sheen. A single fish or a group with more females than males works well. They are carnivores that hunt insects, larvae and small fish, eagerly taking floating pellets, and frozen or live foods like bloodworm and brine shrimp. Predatory by nature, they will eat any fish small enough to fit in their mouth, so choose tankmates of similar size or larger. Hardy and undemanding, their main risks are ich and fin rot from poor water, easily prevented with clean, stable conditions.

• How active is a Golden Wonder Killifish?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Golden Wonder Killifish need?

  Easy tank upkeep. No grooming here — steady water quality and routine tank care do it.

• What tank size does a Golden Wonder Killifish need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Golden Wonder Killifish a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Golden Wonder Killifish live?

  3–4 years. Plan for a long, loving relationship.

• What health issues affect the Golden Wonder Killifish?

  Keep an eye out for Ich (white spot), Fin rot, Skin conditions. These are worth raising with your vet, along with any screening they recommend.

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