The holotype was discovered near a waterfall in the Ndian River in Cameroon and currently is located in the Stockholm Museum.

[3] A. bivittatum has an elongated, brightly coloured body with two dark bands made up of red spots running along each side, with the colors varying between populations.

[4] The males have a maximum body length of approximately 5 centimetres (2.0 in) and have brightly marked, tall and pointed anal and dorsal fins that are yellow to pastel green with red edges.

[4] The caudal and dorsal fins are green with red spots and bright yellow tips.

[5] The species is found in small calcium rich steams in the coastal rainforests of southeastern Nigeria and southwestern Cameroon.