Sunset Apistogramma
Sunset Apistogramma (Apistogramma atahualpa) is a strikingly beautiful species named for the Inca emperor Atahualpa. Males develop a warm golden-orange to deep orange body suffused with blue iridescence — a combination of warm and cool tones that creates the sunset-like color effect that gives this fish its common name. The species is relatively newly described (1991) and remains less commonly available than the most popular apistogrammas.
Feeding & Care Tip: Always soak Hikari Micro Pellets in a small cup of tank water for 30–60 seconds before feeding — Apistogrammas can be prone to bloat from dry foods expanding in the gut. Hikari Vibra Bites are an excellent treat option; the sinking worm-like shape triggers the natural hunting instinct of these micro-predators and they will snap them up eagerly. Sunset coloration is most vivid in soft, slightly acidic water with tannin additions and dark substrate. Bright lighting on a pale substrate will wash out the orange tones considerably. For breeding conditioning, Hikari Frozen or Freeze-Dried Tubifex Worms fed 2–3 times per week reliably trigger spawning behavior and improve egg quality.
Native to the Río Tigre and Río Corrientes drainages in Loreto, Peru — soft, slightly acidic blackwater systems typical of the western Amazon. In the aquarium, replicating these conditions with Indian almond leaves, driftwood, and dark substrate produces the richest sunset coloration.
Keep one male with two or more females. Males display beautiful warm-toned coloration and are moderately territorial. Completely peaceful with small tetras, rasboras, and Corydoras. The warm orange tones of this species are particularly effective against a backdrop of green plants.
Apistogrammas are cave-spawning dwarf cichlids. The female takes on all parental duties — she guards the eggs and fry aggressively while her body turns bright canary yellow as a warning signal. Males should be watched during this period as females may attack them to protect the spawn; providing sight-breaks with plants and décor helps reduce tension. Coconut caves, clay pots, or driftwood crevices all make excellent spawning sites. Fry are initially tiny and require infusoria or freshly hatched baby brine shrimp for their first meals. Apistogrammas are found in the leaf-litter zones of blackwater forest streams and require a well-decorated aquarium to feel secure and display their best color. A dark substrate, driftwood, leaf litter (Indian almond leaves are ideal), and dense planting around the edges with open sandy areas in the center replicates the natural habitat and dramatically reduces stress. Stressed apistos hide, fade in color, and become susceptible to disease. A comfortable apisto is a spectacular one.
Care & Ideal Parameters
| Difficulty | Easy — Moderate |
| Temperament | Peaceful — Dwarf Cichlid Community |
| Male Adult Size | 3.0 inches (7.5 cm) |
| Female Adult Size | 1.75 inches (4.5 cm) |
| Min. Group Size | 1 male with 2+ females |
| Ideal Temp | 75–84°F (24–29°C) |
| Ideal pH | 6.0–7.0 |
| Ideal GH | 1–10 dGH |
| Ideal KH | 0–6 dKH |
| Staple Food | Hikari Micro Pellets (soak before feeding) |
| Treat / Supplement | Hikari Frozen Bloodworms; Hikari Frozen Baby Brine Shrimp; Hikari Vibra Bites; Hikari Frozen or Freeze-Dried Tubifex Worms (especially for breeding conditioning) |
| Origin | Río Tigre and Río Corrientes, Loreto, Peru |
| Notes | Named for Inca emperor Atahualpa. Warm orange-gold body with blue iridescence. Described 1991 — less commonly available than most trade apistos. Soft blackwater conditions essential for best color. |