This species is sexually dimorphic, meaning the males and females have differing physical characteristics.

Pseudanthias bimaculatus males are primarily red with jagged pink lines along the body.

Males will typically have yellow highlights on the tail, anal fins, and head area.

It is found in various reefs of ranging in the Indo-West Pacific from East Africa, Maldives, and Indonesia.

If a dominant male perishes, the largest female of the group will often morph to take its place.