Notopus dorsipes is a species of frog crab from the family Raninidae which has an Indo-Pacific distribution and which has recently spread into the eastern Mediterranean.

The front border of the orbit is less than half the width of carapace at its widest point and has five fronto-orbital spines.

The pereiopods are fringed with long, thin bristles with a broad dactylus and a flattened merus and carpus.

[4] Notopus dorsipes is found in the Indian and Pacific Oceans from the Red Sea and eastern Africa to Japan to the Great Barrier Reef, although there are few records from the Sunda Shelf region in south-east Asia.

The species is now most likely established in the Mediterranean and the probable route of colonisation was from the Red Sea via the Suez Canal, i.e. Lessepsian migration.