Golden Wonder Killifish

Scientific Name: Aplocheilus lineatus
Common Names: Golden Wonder Killifish, Striped Panchax
Origin: India and Sri Lanka
Adult Size: 3–4 inches (7.5–10 cm)
Lifespan: 3–5 years
Temperament: Generally peaceful, but predatory toward small tankmates
Swimming Zone: Surface to midwater

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Sales Description

The Golden Wonder Killifish (Aplocheilus lineatus) is a dazzling surface-dwelling species known for its metallic gold and green coloration, long slender body, and peaceful yet bold personality. With its reflective scales and active surface-swimming behavior, it brings a unique presence to the upper levels of any aquarium.

Hardy and adaptable, this killifish is an excellent choice for both beginners and experienced aquarists. It thrives in planted community tanks, although due to its natural predatory instincts, it's best housed with similarly sized or larger peaceful tankmates. Their striking golden appearance and ease of care make them a standout addition to any freshwater setup.

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Care Guide

Tank Requirements

• Tank Size: Minimum 20 gallons (long format preferred)

• Aquascape Style: Open swimming space with floating plants or overhanging hardscape

• Lid/Cover: Required — excellent jumpers

• Lighting: Moderate; highlights reflective colors

• Substrate: Any — sand or gravel acceptable

• Water Flow: Low to moderate current

Water Parameters

• Temperature: 72–82°F (22–28°C)

• pH: 6.5–7.5

• Hardness: Soft to moderately hard water

• Water Changes: Weekly, 20–30% to maintain water clarity and quality

Feeding & Diet

• Diet: Carnivore

• Feeding Frequency: Once or twice daily

• Preferred Foods:

  • Floating pellets, flakes

  • Frozen or live foods: bloodworms, daphnia, mosquito larvae, brine shrimp

  • Occasional treats like Repashy Meat Pie or Spawn & Grow

Note: Strong surface feeder — offer floating foods for optimal feeding response.

Behavior & Tankmates

• Temperament: Generally peaceful, but opportunistic predator

• Best Kept: Singly or in small groups (with cover to reduce aggression among males)

• Compatible Tankmates:

  • Similar-sized peaceful fish: rainbowfish, larger rasboras, gouramis

  • Corydoras, larger tetras, dwarf cichlids (like Apistogramma)

• Avoid:

  • Very small fish (e.g., neon tetras, shrimp) — may be viewed as prey

  • Aggressive or nippy species

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Breeding Notes

• Spawning Type: Egg scatterer

• Breeding Setup:

  • Use floating plants or spawning mops

  • Eggs hatch in ~10–14 days at warm temperatures

  • Remove adults post-spawning to protect eggs and fry

• Fry Care:

  • Feed infusoria, vinegar eels, or baby brine shrimp

  • Keep water shallow and clean

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Available Now at Planted Aquaria

Add shimmer and surface activity to your aquarium with the Golden Wonder Killifish. These easy-to-care-for fish are not only striking in color but full of personality, making them an excellent surface-dwelling addition to semi-peaceful community tanks.