Hyphessobrycon erythrostigma

The dorsal fin of the bleeding heart tetra is more elongated than the female's. Breeding is difficult and requires peat filtration, with fine-leafed plants for a "spawning substrate." Incubation must take place in darkness. Size: 4-5 cm

• Melanochromis auratus
• Trichogaster trichopterus
• Aphyosemion walkeri
• Cyrtocara moorii
• Tetraodon fluviatilis