Family: Lebiasinidae
Nannostomus trifasciatus — a Lebiasinidae from South America. Reaches 4.5–6.6 cm; keep at 23–28 °C.
A Lebiasinidae species native to South America: Nannostomus trifasciatus lives upper; surface-oriented over blackwater streams and flooded forest margins. Mostly peaceful; males spar briefly. Adults reach 4.5–6.6 cm. It is one of the aquarium-kept Nannostomus species we profile, alongside Nannostomus beckfordi, Nannostomus eques, Nannostomus harrisoni.
A moderate-level species: mostly peaceful; males spar briefly; stable water matters more than fancy equipment.
Aim for 23–28 °C. Heater for stable tropical warmth; 23–28 °C curated husbandry range.
Adults reach 4.5–6.6 cm; it is upper; surface-oriented. Plan for at least 52 litres.
Carnivore-leaning omnivore; small foods. It forages naturally over dark sand and leaf litter, so let some food reach the bottom.
Yes, with care. Mostly peaceful; males spar briefly — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.
Comes from South America: blackwater streams and flooded forest margins. Expect still to gentle current and moderate.
It can jump when startled — keep the tank tightly covered, especially at night and during maintenance.
Egg-scatterer among fine plants. Males more colourful.