Golden Panchax / Golden Wonder Killifish Care Guide (Aplocheilus lineatus)
Appearance and Behavior
- Coloration: The captive-bred variant is known for its intense iridescent gold-yellow body, often with a subtle blue-green sheen. The males’ fins are usually elongated, developing yellow and reddish tips.
- Dwelling Level: This is a dedicated top-dweller that spends almost all its time hovering just below the surface, waiting for food.
- Predatory Nature: It has a large, upturned mouth. It is an effective predator and will eat any fish or shrimp that fits into its mouth (including small fry, Neons, and tiny Rasboras).
- Caution: Jumping: Killifish are famous for jumping out of the water to catch insects in the wild. A tight-fitting, weighted lid is essential.
Tank Requirements and Water Parameters
- Minimum Tank Size: 20 gallons is the minimum, but a longer tank (30 gallons or more) is highly recommended to provide adequate surface swimming area.
- Social Structure: They can be kept alone, in a pair, or in a small group (3+). Males can be territorial with each other, so a ratio of one male to two or three females is often advised in smaller tanks.
- Temperature: Tropical range: 72°–77° F (22°–25° C). They tolerate warmer water but do well in the lower range.
- pH Level: Highly adaptable: 6.0 to 7.5. They are hardy and tolerate a variety of water conditions, including slightly brackish water in the wild, though freshwater is fine in the aquarium.
- Aquascape: The tank should have floating plants to diffuse lighting and provide security at the water surface. Open space is needed for swimming.
Diet and Feeding
The Golden Panchax is a carnivore and a voracious surface feeder.
- Staple Diet: High-quality floating pellets or flakes.
- Essential Diet: Their diet must be heavily supplemented with meaty, surface-oriented foods: Live or frozen Bloodworms, Brine Shrimp, Daphnia, and insect larvae.
Compatibility
- Good Tank Mates: Other robust, non-aggressive fish that are too large to be eaten. Good choices are larger Tetras, Corydoras catfish, Plecos, and large Rasboras/Danios.
- Avoid: All nano fish (Neons, Boraras, etc.), shrimp (especially dwarf shrimp), and any small fish that occupies the upper water column.





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