Rope Fish
Erpetoichthys calabaricus
The Rope Fish (Erpetoichthys calabaricus) is a peaceful fish that's a good step up once you have a little experience. Give it a tank of at least 250 litres (66 US gallons), water held at 75-82°F, and a pH of 6-7.5.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Slow rivers and swamps of West and Central Africa.
- Africa
Regional colours match the stocking calculator's origin map.
Rope Fish Tank Setup
Treat 250 litres (66 US gallons) as a starting point - big predators need length, strong filtration, and a secure lid. Hold the water at 75-82°F and pH 6-7.5, and assume anything small enough to swallow will eventually be eaten. They grow to around 40 cm, so plan the tank size and filtration for a full-grown adult rather than the small juvenile you see in the shop.
What Do Rope Fish Eat?
They're meat-eaters, so feed good-quality frozen or gel foods rather than relying on generic flake. Go easy on portions - leftover protein fouls the water faster than plant foods do.
Rope Fish Tank Mates
Escape artist; will eat small fish The Rope Fish is peaceful, which is the first thing to weigh up when you choose tank mates. It's predatory, so anything small enough to fit in its mouth will be treated as food rather than a companion. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Rope Fish Good for Beginners?
Not a sensible first purchase. Get the tank cycled, keep easier fish stable for a year, then revisit if you still want the extra work this species demands.
Rope Fish - frequently asked questions
What size tank do Rope Fish need?
Rope Fish need a tank of at least 250 litres (66 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
What water parameters do Rope Fish need?
Keep them at 75-82°F with a pH of 6-7.5, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Rope Fish eat?
Rope Fish are meat-eaters. Feed good-quality frozen or gel foods rather than relying on generic flake, and don't overfeed. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Rope Fish good for beginners?
Rope Fish are best for keepers with a little experience. They are manageable once you test water regularly and catch problems early; a complete beginner may prefer something more forgiving first.
Common mistakes with Rope Fish
- Underestimating tank size - the minimum footprint is 250 litres (66 US gallons); impulse buying into a smaller tank leads to stress and shortened lifespan.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Rope Fish
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- Serpae TetraFin nipper - will shred the fins of peaceful fish
- Zebra DanioFin nipper - will shred the fins of peaceful fish
