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

• Brachygobius xanthozona (Gobiidae)
• Poecilia latipinna
• Megalamphodus megalopterus
• Uaru amphiacanthoides
• Geophagus steindachneri