The Yellow Watchman goby is an iconic fish that is an incredibly bright lemony yellow all over. Depending on its mood this color may darken, and several wide bands may appear along its body. Its back and fins are speckled with sparkling sapphire spots. It may be especially territorial towards similar species. Males and females are visually identical. It grows to 3 inches; we recommend an aquarium of at least 10 gallons. It prefers to pair with a Tiger pistol shrimp.