Ancistrus hoplogenys (L059)

Ancistrus hoplogenys is a species that looks far more striking than the common bristlenose, with large, scattered white spots on a black background. It is spread over a wide area in the Amazon, Essequibo and Paraguay basins; it is especially abundant in the middle Rio Negro, and most fish in the trade come from there.

Its standard length reaches 15–16 cm, so it needs a somewhat larger aquarium than the common bristlenose. It is easy to keep and is often confused with the L183 starlight bristlenose.

• At least 120 liters for one or two fish.
• Roots, caves and flat stones; males claim a cave of their own.
• 25–28°C; soft, slightly acidic water improves color.

Mainly herbivorous. Make spirulina and vegetable sinking tablets, blanched zucchini, cucumber and spinach the staple; bloodworms or mysis can be added once a week. It rasps on roots.

Peaceful; it leaves other fish and shrimp alone. Males chase each other over caves.

Good companions: Cardinal tetras, rummy-nose tetras, apistogramma, discus, corydoras, shrimp.

Avoid: Large cichlids that claim the bottom, large territorial plecos.