Rainbow Shark (Epalzeorhynchos frenatum) is a intermediate-level freshwater fish that needs at least 55 gallons and 72-79°F. A black bottom-dweller with red fins that guards its territory, especially against similar fish. Best kept one per tank.
Care facts at a glance
| Scientific name | Epalzeorhynchos frenatum |
|---|---|
| Family | Cyprinidae |
| Origin | Thailand |
| Adult size | 6 in |
| Minimum tank | 55 gallons |
| Temperature | 72-79°F |
| pH | 6.5-7.5 |
| Temperament | Territorial |
| Social behavior | Solitary |
| Swim level | Bottom |
| Difficulty | Intermediate |
| Diet | Omnivore: pellets, algae wafers, frozen foods |
| Typical lifespan | 5-8 years |
Quick tips
- Keep only one per tank.
- Provide caves and hiding spots.
San Diego water
Captive-bred stock usually adapts to San Diego tap water with slow acclimation. For best color and health, many keepers blend tap with RO/DI water. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi