The golden mantella has an aqua/chartruse dorsal surface. The ventral surface is yellow in females, and a lighter yellow in the males. The inside of the thigh occasionally exhibits bright red colouring. These frogs are small, reaching a size of 2.5 cm (1 in) in length. The tympanum is visible, but small. Their brightly colored skin warns their predators they are very poisonous. There is also a red form.
Ecology and behavior 
The golden mantellas do not have a particular mating season; they will mate after rain and if enough food is available. The males will call from a concealed position near a water source. The call is a series of three clicks, repeated many times. Once the females are amplexed, they will move towards a suitable area, and lay eggs. They lay eggs on moist land, and the tadpoles are washed into water once they hatch.
As a pet 
The golden mantella is occasionally held in captivity either as wild-caught or as a captive-bred specimen. These frogs can withstand more heat than highland species usually found in the mountains, but are very sensitive and should only be kept by experienced terrarium keepers. A 20-US-gallon aquarium is enough to keep six mantellas.