Overview
The Four-Eyed Fish (Anableps anableps) is a advanced brackish species known for its brown-olive coloration. Eyes divided for seeing above/below water simultaneously. Surface.
Origin & Appearance
Origin: Central/South America.
Colors: Brown-Olive.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 30.0 x 5.4 x 9.0.
Sexual Dimorphism: Moderate; males have gonopodium.
Tank & Water Requirements
| Min Tank Size | 79 gallons |
| Temperature | 77–82°F |
| pH Range | 7.5–8.5 |
| Water Hardness (GH) | 10-25 |
| Bioload | high |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | Surface |
Behavior & Activity
Surface cruiser; floats at waterline with divided eyes scanning above and below simultaneously; gentle forward cruising
Speed: 45/100Aggression: 3/10diurnalSchooling (4+)
Breeding
Easy; livebearer
Common Diseases
💊 Ich
Expert Notes
Eyes divided for seeing above/below water simultaneously