Mantella baroni is an attractive species, exhibiting contrasting colors of black, orange, and yellow or green. They can easily be confused with M. madagascariensis and also some populations of M. pulchra, both of which have a similar pattern. See Correctly Identifying Mantella baroni and Mantella madagascariensis for more information. A large and slender mantella, adult frogs can grow to 30 mm (1.2 inches). Females are generally bigger than males and more robust in appearance. Females also lack the ability to call. Frogs from populations in the southern most part of M. baroni’s distribution (in forest on the eastern side of the Andringtra Mountains) have variable amounts of green or yellow on the dorsum. Although they appear different from M. baroni, genetically they seem to be the same species.