Golden Wonder Killifish - Aplocheilus lineatus

Golden Wonder Killifish (Aplocheilus lineatus) is a striking surface-dwelling fish known for its shimmering golden body and bold, predatory nature. Its peaceful appearance hides an active hunter, making it a fascinating addition to larger community aquariums with compatible tankmates.

Description:

Common Name: Golden Wonder Killifish

Scientific Name: Aplocheilus lineatus

Family: Aplocheilidae

Size: 4–5 inches

Temperament: Semi-aggressive

Difficulty: Easy

Native Region:

South Asia (India and Sri Lanka) 

Aquarium Setup:

Tank Size: Minimum 30 gallons

Temperature: 72–82°F

pH: 6.0–7.5

Hardness: Soft to moderately hard

Decor: Floating plants, dim lighting, and open surface area for swimming 

Additional Tips:

• Tankmates: Best kept with medium-sized, non-fin-nipping species; may prey on small fish

• Diet: Carnivorous – thrives on live or frozen foods such as bloodworms, brine shrimp, and insect larvae; will accept quality pellets

• Behavior: Prefers the surface zone; known for quick strikes at food

• Lid required: Excellent jumpers, so a secure aquarium cover is essential