Geophagus neambi

About

A deep-bodied eartheater from Brazil's Rio Tocantins drainage, Geophagus neambi spent years circulating in the hobby under informal trade names like 'G. sp. Tocantins' before being formally described. It belongs to the G. surinamensis group, a cluster of closely related species that are notoriously difficult to tell apart, especially as juveniles. Adults display brownish-red caudal fins dotted with blue iridescent spots, a dark mid-lateral spot sitting within the third of eight or nine faint flank bars, and a notably deep head and body profile. The bars themselves are usually only visible when fish are stressed or spawning. Despite being listed as aggressive and territorial, this species is surprisingly tolerant of tankmates outside of breeding periods and poses no threat to anything it cannot fit in its mouth. The key is keeping it in a proper group of at least five to eight individuals, which allows a natural dominance hierarchy to develop and prevents weaker fish from bearing the full brunt of dominant individuals. A large, sandy-bottomed aquarium suits them well, as they're classic substrate-sifters by nature. Breeding follows typical biparental mouthbrooding patterns, with the female usually taking initial custody of eggs while the male defends the surrounding territory. Pairs form naturally from a group, since reliable sexing is not really possible. Patience is required as sexual maturity can take a year or more to reach.