Common Name
Red Fin Thresher Pleco, L011 and L035, Pará locality
Scientific name
Aphanotorulus emarginatus | Trade name often listed as Squaliforma emarginata
Origin and Habitat
These fish are collected in the Pará State, most often collected in the Rio Pará. Amazon basin native with many regional forms. In these stretches the water runs clear, warm, and well oxygenated over sand, rock, and submerged roots. Fish shelter among crevices and roots by day, then move to open margins and sand bars at dusk to feed. Related L011 and L035 populations are documented from Xingu near Altamira and the Araguaia just above its confluence with the Tocantins, while Pará records include the Rio Trombetas and Rio Pará proper. Locality matters because pattern and fin edge variation can differ between populations.
Physical Characteristics
| Feature | Detail |
|---|---|
| Body Shape | Streamlined, slightly elongated |
| Fin Edges | Distinctly red-tipped, especially on caudal and dorsal fins |
| Size | Up to 15 cm in length |
| Coloration | Dark green to brown body with red fin margins |
FAQ
What makes the Pará population of this pleco different from others?
The Pará population exhibits distinct red fin edge patterns, especially on the caudal and dorsal fins, which differ from populations in the Xingu or Araguaia regions.
Is this species suitable for a community aquarium?
Yes, it is well-suited for a community tank with adequate space and strong water flow, as it prefers open areas and sand substrates.
How does this pleco behave during the day and night?
By day, it hides among rocks and roots. At dusk, it moves to open sand bars to feed, showing active behavior during nighttime feeding periods.
Alexandra Hunter –
The Red Fin Thresher Pleco is a striking addition to my tank. The red fin edges stand out beautifully against the dark body. It’s active at night and hides well during the day. Water parameters are stable with good flow and a sandy substrate. Very satisfied with the fish’s health and appearance.
Trevor Young –
Arrived quickly and the fish looked healthy. The red fins are clearly visible and it’s active in the evening. I’ve noticed it prefers the sand areas near the back of the tank. Needs a bit of space, but overall a great choice for an Amazonian species.
Owen Wilson –
This pleco is a true representation of the Pará population. The fin coloration is vivid and consistent. It’s peaceful and doesn’t dominate the tank. I appreciate the detailed origin information provided with the product.