Blockhead Cichlid
Steatocranus casuarius
The Blockhead Cichlid (Steatocranus casuarius) is a peaceful fish that's best left to experienced keepers. Give it a tank of at least 95 litres (25 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
West Africa
- Africa
Regional colours match the stocking calculator's origin map.
Blockhead Cichlid Tank Setup
Give them at least 95 litres (25 US gallons). Cichlids are territorial and produce plenty of waste, so strong filtration and some rocks or wood to break up sight lines both help. Aim for 75-82°F and a pH around 6-7.5. They reach about 12 cm as adults, so don't be misled by the small juveniles sold in stores.
What Do Blockhead Cichlids 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.
Blockhead Cichlid Tank Mates
West African river cichlid - unlike Rift Lake species, prefers soft, slightly acidic to neutral water. Genuinely one of the more peaceful cichlids for a community setup, though pairs become protective around eggs and fry. The Blockhead Cichlid is peaceful, territorial dwarf cichlid, which is the first thing to weigh up when you choose tank mates. Good matches come down to the whole stocking list working together - temperature, tank size, and temperament - not any single label. 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 Blockhead Cichlids 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.
Blockhead Cichlid - frequently asked questions
What size tank do Blockhead Cichlids need?
Blockhead Cichlids need a tank of at least 95 litres (25 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 Blockhead Cichlids 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 Blockhead Cichlids eat?
Blockhead Cichlids 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 Blockhead Cichlids good for beginners?
Blockhead Cichlids are not a beginner species. They need precise conditions and consistent maintenance, so build experience with hardier fish before keeping them.
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.
Check Blockhead Cichlid against any other fish → Compares water parameters, predation risk, fin nipping and tank size, and draws both at life size.
Fish to avoid mixing with Blockhead Cichlids
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- Pea PufferPredator - Pea Puffer will eat or injure smaller tank mates
- Serpae TetraFin nipper - will shred the fins of peaceful fish
- Tiger BarbFin nipper - will shred the fins of peaceful fish
