Overview
The Rainbow Shark (Epalzeorhynchos frenatum) is a intermediate freshwater species known for its dark gray-black, red-orange fins coloration. Territorial bottom dweller. Bottom.
Origin & Appearance
Origin: Thailand.
Colors: Dark Gray-Black, Red-Orange fins.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 15.0 x 2.7 x 4.5.
Sexual Dimorphism: Minimal.
Tank & Water Requirements
| Min Tank Size | 30 gallons |
| Temperature | 72–79°F |
| pH Range | 6.5–7.5 |
| Water Hardness (GH) | 5-15 |
| Bioload | medium |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | Bottom |
Behavior & Activity
Bottom-to-mid territorial patroller; chases tankmates from claimed territory; rapid darting attacks followed by steady patrol swimming
Speed: 50/100Aggression: 6/10diurnal
Breeding
Moderate; egg layer
Common Diseases
💊 Ich
Expert Notes
Territorial bottom dweller