(D. S. Jordan, 1884)
The Slow goby (Aruma histrio) is a species of goby fish endemic to the Gulf of California on the west coast of North America. It inhabits crevices in rocks and can be found in tide pools down to a depth of around 14 metres (46 ft). This species grows to a maximum length of 6.5 centimetres (2.6 in) SL. This species is the only known member of its genus.