The One-spot Hemiodus possesses a distinct black body spot and a black- or cream-streaked caudal fin. In these characteristics it resembles a relative, Hemiodopsis microlepis (Red-tailed, or Feather, Hemiodus). In the southern parts of the range, around the Rio Paraguay, there is another similar-looking species, Hemiodus orthonops (which has a greater number of lateral line scales). Hemiodus rudolphoi (Rudolph’s Hemiodus), the only other species in the genus, is occasionally seen.
Other common name
- Yellow-tailed Hemiodus
- Anisitsia notata, Hemiodus microcephalus
- Hemiodontidae (referred to as Hemiodidae by some authors)
- Rio Negro (Brazil), the Guianas, and the Orinoco system.
- Up to 7 1/2in (19cm).
- Shoaler, with distinct appetite for succulent plants. Diet: Most foods accepted; vegetable component recommended.
- Spacious tank with ample swimming space. Provide robust, unpalatable, or artificial plants. Well-oxygenated water important; water chemistry not critical, but soft, acid conditions preferred. Temperature range: 73-81 °F (23-27 °C).
- No documented accounts currently available.