Peter's Elephantnose
Gnathonemus petersii
The Peter's Elephantnose (Gnathonemus petersii) is a peaceful fish that's rewarding to keep. Give it a tank of at least 250 litres (66 US gallons), water held at 73-82°F, and a pH of 6.5-7.5.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Africa
- Africa
Regional colours match the stocking calculator's origin map.
Peter's Elephantnose Tank Setup
A tank of at least 250 litres (66 US gallons) works well. Keep the water at 73-82°F with a pH around 6.5-7.5, and set up both cover and open swimming space where they spend most of their time (Mid). They reach about 22 cm as adults, so don't be misled by the small juveniles sold in stores.
What Do Peter's Elephantnoses Eat?
They're not fussy eaters - feed a varied diet, rotating good-quality dry, frozen, and gel foods rather than the same thing every day, and match the food size to their mouths.
Peter's Elephantnose Tank Mates
Requires a large tank and good filtration. The Peter's Elephantnose is peaceful, which is the first thing to weigh up when you choose tank mates. At around 22 cm fully grown, it needs tank mates that can hold their own against its size and appetite. 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 Peter's Elephantnoses Good for Beginners?
Care demand varies by line and setup. Match the care level to how often you actually test and change water.
Peter's Elephantnose - frequently asked questions
What size tank do Peter's Elephantnoses need?
Peter's Elephantnoses 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 Peter's Elephantnoses need?
Keep them at 73-82°F with a pH of 6.5-7.5, 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 Peter's Elephantnoses eat?
Peter's Elephantnoses are omnivores and aren't fussy eaters. Feed a varied mix of good-quality dry, frozen, and gel foods, and match the food size to their mouths. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Peter's Elephantnoses good for beginners?
It depends on the setup. Match Peter's Elephantnoses to how often you actually test water and perform maintenance.
Common mistakes with Peter's Elephantnoses
- 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 Peter's Elephantnoses
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
- Pea PufferPredator - Pea Puffer will eat or injure smaller tank mates
- Betta (Male)Predator - Betta (Male) will eat or injure smaller tank mates
