Bigmouth

About

Once circulating in the hobby under the nickname 'großmaul' (bigmouth) and the code A190, Apistogramma norberti is a small but feisty dwarf cichlid native to the blackwater systems of the Tahuayo River basin in Peru. Like most Amazonian blackwater habitats, its home is soft, acidic, and tannin-stained, and replicating those conditions in the aquarium will bring out the best in this fish. Males are noticeably larger than females and typically show the more vivid coloration common across the genus, while females take on a strong yellow wash when guarding a spawn. The taxonomy of this species is still being worked out. It sits tentatively near the cacatuoides group but shows traits that link it to the nijsseni group as well. That uncertainty makes it genuinely interesting for hobbyists who follow Apistogramma systematics. In terms of keeping, captive-bred individuals settle into a community setup more readily than wild-caught fish, which tend to do better in a species-focused tank with only small, non-competing dither fish for company. Mixing it with other Apistogramma is generally a bad idea. Breeding follows typical dwarf cichlid form. Eggs are laid in a cave or crevice and the female takes charge of guarding them, sometimes aggressively enough that the male needs his own space.