[5] In most species in the family Pipidae, sound production occurs without externally visible movements of the flanks or throat and is based on a different mechanism than in anurans in general.

However, within pipids, Hymenochirus appears to be an exception, and sound production is based on moving air in a more conventional anuran manner.

[5] Pseudhymenochirus merlini is a largely aquatic frog that lives in aquatic habitats with shade, e.g., still water in lowland forests and agricultural land, and in small, very slow-moving rocky streams.

It can colonize newly created aquatic habitats by migrating overland.

Also logging of shading trees and introduced predatory fish can locally have negative impacts, but overall this species in not threatened.