Hyphessobrycon takasei, the Coffee Bean Tetra, is a small and subtly beautiful characid from the blackwater streams of the Amazon basin in Brazil. Its common name references the distinctive dark, oval humeral spot on the shoulder — resembling a coffee bean — set against a translucent pale body with a faint rosy or yellowish cast. While not as flashy as some of its relatives, the Coffee Bean Tetra possesses a quiet elegance that appeals to aquarists who favor natural, biotope-style setups. This species is less commonly available in the trade, making it a sought-after find among tetra enthusiasts. It inhabits soft, acidic, heavily shaded blackwater environments and is more parameter-sensitive than hardier tetras, requiring stable soft acidic conditions for long-term health and natural behavior. In too-hard or too-alkaline water, color fades and the fish becomes prone to stress-related illness. The Coffee Bean Tetra is entirely peaceful and timid, being easily outcompeted by more assertive tankmates. It is best housed with similarly small, calm species and should be kept in schools of 8 or more to increase confidence. Its intermediate difficulty rating reflects its specific water chemistry requirements rather than temperament or feeding challenges.
