Slow goby

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 m. This species grows to a maximum length of 6.5 cm SL. This species is the only known member of its genus.

Description
It is brown with 6-7 white bars along its side, with some bars weak or missing. There is a narrow white bar at the base of its pectoral fin, followed by a dark brown bar. It is elongated and somewhat compressed. Its large head is flattened with swollen cheeks and a large mouth. It has a pore between its eyes, and two small pores on its preopercle. Its tail fin is long and rounded without scales or a lateral line.

Habitat
The slow goby inhabits rocky crevices in tide pools and under cobble in shallow water. The larvae are usually found around sargassum. It needs a temperature of 20.8-23.8 degrees Celsius (69.4-74.8 degrees Fahrenheit). Adults are benthic.