Adolfo’s Corydoras
Adolfo’s Corydoras (Corydoras adolfoi) is one of the most striking and sought-after corydoras in the hobby. The pale body displays an intense orange band across the top of the head and nape — blazing like a flame against the otherwise monochrome fish — with a bold black band running through the eye and along the back, and a distinctive black spot at the base of the dorsal fin. Named for legendary fish collector Adolfo Schwartz.
Feeding & Care Tip: Hikari Sinking Wafers make an excellent daily staple and Sera Vipachips Tropical Wafers are an excellent alternative. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Tubifex Worms or Hikari Frozen or Freeze-Dried Bloodworms to enhance the vivid orange nape coloration. Feed near the substrate at lights-out.
Native to small tributaries of the upper Rio Negro near São Gabriel da Cachoeira in Amazonas, Brazil — a blackwater specialist from one of the softest, most acidic river systems in South America. In the aquarium, soft, slightly acidic water with tannin additions, fine sand substrate, and dim lighting replicates its natural blackwater habitat and produces the most vivid orange nape coloration.
Keep in groups of at least six — this is not optional for Corydoras. In the wild these fish occur in schools of dozens to hundreds. A lone Corydoras or a group of fewer than six is a stressed fish that stays hidden, refuses food, and lives a shortened life. In a proper group they are bold, constantly active, and endlessly entertaining to watch as they forage together across the bottom of the aquarium.
Corydoras are highly sensitive to substrate quality — fine sand is strongly preferred over gravel, as rough substrates damage the delicate barbels they use to forage. Regular partial water changes and pristine water quality are essential, as all Corydoras are sensitive to nitrites and dissolved waste. Sand substrate, gentle flow, and shaded areas with driftwood or plants will keep this species at its happiest and most active.
Care & Ideal Parameters
| Difficulty | Easy — Moderate |
| Temperament | Peaceful — Community |
| Typical Adult Size | 2.3 inches (5.7 cm) |
| Min. Group Size | 6 minimum — groups of 8+ for best color and behavior |
| Ideal Temp | 68–79°F (20–26°C) |
| Ideal pH | 6.0–7.0 |
| Ideal GH | 0–15 dGH |
| Ideal KH | 0–8 dKH |
| Staple Food | Hikari Sinking Wafers; Sera Vipachips Tropical Wafers |
| Treat / Supplement | Hikari Frozen or Freeze-Dried Tubifex Worms, Hikari Frozen or Freeze-Dried Bloodworms |
| Origin | Upper Rio Negro tributaries, Amazonas, Brazil |
| Notes | Orange nape band is the defining feature — most vivid in soft blackwater conditions. Wild-caught specimens require careful acclimatization. Often confused with C. duplicareus — adolfoi has orange only on the nape while duplicareus extends orange to the dorsal fin area. |
