The Slow goby (Aruma histrio) is a species of gobies, 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.

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