Geophagus altifrons from the Rio Negro

The Geophagus altifrons from the Rio Negro is a large, peaceful "eartheater" cichlid known for its high forehead, iridescent colors, and distinctive sand-sifting behavior, thriving in soft, acidic blackwater with sandy bottoms, often featuring driftwood; it's a centerpiece fish that can grow up to 30 cm but needs ample space, a group setting, and tanks mimicking the Amazonian Rio Negro's clear/blackwater conditions.