Author: Crampton, de Santana, Waddell & Lovejoy, 2017
Comments: Occurs only in whitewater floodplain habitats where it is observed throughout the year in floating macrophytes.  Most abundant in sheltered floodplain lakes surrounded by high levee forest, but has a patchy distribution, and varies in abundance at a given site from year to year.  Occurs sympatrically and syntopically in whitewater floodplain with the following congeners:  <i>Brachyhypopomus beebei</i>, <i>B. belindae</i>, <i>B. bennetti</i>, <i>B. brevirostris</i>, <i>B. hamiltoni</i>, <i>B. pinnicaudatus</i>, <i>B. regani</i>, and <i>B. walteri</i>.  Exhibits allotopic distributions across parts of its range with <i>Brachyhypopomus batesi</i>, <i>B. benjamini</i>¸ <i>B. hendersoni</i>, <i>B. sullivani</i>, and <i>B. verdii</i>.  Feeds on aquatic insect larvae, microcrustacea, and other small aquatic invertebrates, with a predominance of Chironomidae larvae in the type locality (Ref. 116763).