Four Eyed Fish Overview
The Anableps anableps, or Four Eyed Fish, is a striking species known for its bi-colored appearance and curious behavior. These fish thrive in brackish water conditions and are quite active. Their slender bodies and vibrant colors make them a captivating addition to the aquarium. As they are curious and active, it's important to provide them with an adequately sized tank with plenty of open space.
Four Eyed Fish Scientific Classification
| Rank | Classification |
|---|---|
| Family | Anablepidae |
| Genus | Anableps |
| Species | Anableps anableps |
| Water type | brackish |
Four Eyed Fish Natural Habitat
Native to the brackish waters of the Amazon basin in South America, the Four Eyed Fish is commonly found in slow-moving streams and shallow rivers.
Four Eyed Fish Appearance & Size
They have a silver-blue body with distinct black vertical bands running down each side. The unique feature of this species is its eyes, which are set in a way that appears to give them two sets of eyes—one on each side of the head.
Four Eyed Fish Behavior & Temperament
While they do not naturally school, Four Eyed Fish are known to be active and curious. They enjoy exploring the tank and can be kept with other peaceful species, but their high activity level means they may require more space than smaller fish.
| Trait | Value |
|---|---|
| Temperament | active and curious |
| Schooling | No |
| Activity level | high |
Four Eyed Fish Water Requirements
| Parameter | Ideal Range | Notes |
|---|---|---|
| Temperature | 23–27°C (73–81°F) | Use a reliable adjustable heater |
| pH | 7.5–8.5 | Avoid sudden swings |
| Hardness (GH) | 8-20 dGH dGH | Soft to moderately hard |
| Ammonia | 0 ppm | Any detectable ammonia signals a problem |
| Nitrite | 0 ppm | Toxic even at low levels |
| Nitrate | <20 ppm | Manage through regular partial water changes |
| Min. tank | 75L (20 gal) | Larger tanks are easier to keep stable |
Interesting Facts About Four Eyed Fish
- Can live in both freshwater and brackish water environments.
- Have a unique breathing adaptation where they can breathe air directly from the surface.
- Can recognize their own reflections, which is rare among fish.
Species Related to Four Eyed Fish
Related Species & Guides
This species profile was reviewed for biological accuracy and practical aquarium care guidance. For suspected illness or disease, test your water parameters first and consult an aquatic veterinarian if symptoms persist.