The Decorated Goby (Istigobius decoratus) is a benthic feeder and primarily feeds on copepods and other small invertebrates. Providing a varied diet 2-3 times daily that includes live or frozen foods, such as copepods, brine shrimp, and mysis shrimp, is important to meet their nutritional needs. They are reef safe and get to a length of 5 inches. You will want to keep them in tanks with other reef compatible species as they do not fair well in aggressive tanks. A minimum tank size for them is 30 gallons.