The Bay-colored Mouse Opossum is an arboreal marsupial of central South American forests. Its back is gray-brown, its belly buffy yellow, and the end of its tail is pale.
The dorsal fur is gray with a brownish tinge, while the underside is buffy yellow. About the distal third of the tail is pinkish white, although the amount of pale color varies.
It is mainly arboreal and is most often captured in forest understory. It is nocturnal and is described as an insectivore–omnivore.
An extinction-risk assessment has not been added yet.