Overview
The Golden Wonder Killifish (Aplocheilus lineatus) is a beginner freshwater species known for its gold-yellow coloration. Surface dwelling predator. Surface.
Origin & Appearance
Origin: India.
Colors: Gold-Yellow.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 10.0 x 1.8 x 3.0.
Sexual Dimorphism: Strong; males brightly colored, females dull.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 72–77°F |
| pH Range | 6–7.5 |
| Water Hardness (GH) | 3-12 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Surface |
Behavior & Activity
Surface predator lurker; hangs motionless just below surface then strikes downward at insects or small fish
Speed: 40/100Aggression: 3/10diurnalSchooling (6+)
Breeding
Moderate; egg depositor
Common Diseases
💊 Ich
Expert Notes
Surface dwelling predator