Yellow Watchman (Sulphur Goby)

Scientific Name: Valenciennea sulphurea

Small Fish Safe: Yes

Invert Safe: With caution – may eat very small crustaceans

Coral Safe: Yes

Adult Size: Up to 20 cm

Diet: Carnivore – eats meaty frozen foods and sand-dwelling microfauna

Why We Like It:

The Sulphur Goby is a bold, high-impact sand-sifter with striking yellow and blue markings. Constantly moving and reshaping the substrate, it’s excellent for keeping sand beds clean and oxygenated. Best suited to larger, peaceful reef systems with a deep sand bed and secure rockwork, as it can undermine unstable structures. A standout goby with size, presence, and nonstop activity.