Bleeding-heart Tetra

About

The bleeding-heart tetra (Hyphessobrycon erythrostigma) takes its name from the bold crimson spot sitting just behind the gill cover, a feature shared with only two close relatives among the thousands of characids. It comes from the upper Amazon basin, where soft, acidic blackwater conditions are the norm, and that origin matters when thinking about long-term care. The species is the best-known member of a small 'bleeding heart' subgroup that also includes H. socolofi and H. pyrrhonotus, and telling them apart takes a careful eye. Adult males develop an elongated anal fin with a distinctive white band running most of its length, and mature fish of both sexes carry a rosy-pink flush across the body that deepens considerably during social interactions. Despite being labelled aggressive in some sources, the behavior is more accurately described as territorial between males, who display their richest colors while competing for status or female attention. That rivalry is genuinely interesting to watch, and a mixed-sex group of eight or more brings it out reliably. Pair them with similarly sized characins, smaller catfishes, or non-predatory cichlids and they settle in well. This is not the most forgiving species for beginners, but an intermediate keeper with a well-established, softwater setup will find them rewarding and long-lived.