Pyrrhulina obermulleri
Pyrrhulina obermulleri is a diminutive freshwater tetra native to South American rivers, reaching only about 6 cm in length. Anglers target it for its vibrant colors and as a beginner’s catch in lightweight fly and bait‑fishing setups. Though not prized for food, it provides a fun, fast‑moving target for light‑tackle enthusiasts.
Family
Lebiasinidae
Max Size
6 cm
Habitat
freshwater
Climate
tropical
Best Season
Year‑round, with a slight peak during the rainy season (spring to early summer)
Best Time
Early morning and late afternoon
No distribution map available
Mamirauá Sustainable Development Reserve
BrazilProtected floodplain in the Amazon where Pyrrhulina obermulleri thrives among submerged vegetation and black‑water channels.
Best: June-October
Rio Negro (near Manaus)
BrazilSlow‑moving black‑water stretch of the Rio Negro offers abundant surface vegetation ideal for the species.
Best: August-December
Madre de Dios Basin, Upper Amazon
PeruRemote tributaries with clear waters and leaf‑litter habitats where the fish is abundant but access is limited.
Best: March-May
Casiquiare River (Orinoco Basin)
VenezuelaA natural canal linking the Orinoco and Amazon basins; the mixed water types create perfect feeding grounds.
Best: April-June
Pantanal Wetlands (Corumbá Region)
BrazilSeasonally flooded savanna lakes with dense macrophyte mats where the species forms large shoals.
Best: September-November
Lake Yavari (Amazonas–Loreto border)
PeruHigh‑altitude lake at the Brazil‑Peru border; clear, oxygen‑rich waters host healthy populations during the rainy season.
Best: November-February
Best bait: Live daphnia, newly hatched brine shrimp, or micro‑worms