Aruma histrio

Aruma histrio, the Slow goby, is a species of goby 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 length of 6.5 centimetres (2.6 in) SL. This species is the only known member of its genus.