Know what you’re looking at
The tall male dorsal fin is a memorable feature, while females present a different pattern during brood care. Inka 50 and A188 are useful historical trade references. Record those labels, but use a full identification and provenance check when establishing a breeding line.
From river to aquarium
Records include the Shanushi and Paranapura drainages of the Huallaga system in Peru. That specific basin context is more useful than an invented “Amazon” recipe. Build a quiet bottom environment with leaf cover, shade and multiple routes between sheltered spaces.
A practical aquarium plan
The guide uses a base of at least 80 × 30 cm and a 90-litre planning volume. Keep the aquarium moderately warm rather than automatically choosing the hottest tropical setting. An open front viewing area can work if the rear and sides offer real escape cover.
Feeding with observation
Provide small varied foods and establish that both adults eat reliably before attempting conditioning for breeding. Keep feeding observations in the same notebook as water readings. Changes in body condition can reveal a social problem that an occasional glance at the aquarium misses.
When breeding changes the balance
Begin with compatible individuals and a ready means of separating them. The breeding female’s territory needs respect even in a spacious layout. Organize fry food, gentle maintenance and temporary housing before reproduction; successful spawning is only the first stage of raising a brood.
Choose the company carefully
We recommend a species-focused setup in the Finder. Other fish can add distraction, competition or fry predation even when they do not visibly attack adults. Keep the first breeding arrangement simple enough that a behavior change has an identifiable cause and a practical response.
Keep the story with the fish
Buy under the accepted name when possible and retain the original trade labels alongside it. Do not confuse a dramatic high-fin appearance with proof of locality. Keep photographs and breeding records so juveniles can be distributed with a clear and honest identification history.
Sources & editorial notes
Source-checked 2026-09-24. Species facts draw on the references below; aquarium targets, difficulty ratings and planning advice are our editorial synthesis. Targets are deliberately narrower than some reported field ranges and are not a guarantee for every locality or strain.
Informal groups and complexes are navigation aids, not fixed taxonomic ranks. Read the editorial approach.