Like all other Watchman gobies it will stake out a territory and fight off other Watchman. It needs sand and rock work to hide in, and it also will sift the sand looking for food, making it a good sand mover.
Diamond Watchman Goby
Scientific Name: Valencieena puellari
Fish Diet: Formula I & II, Flake, Mysis Shrimp
Reef Safe: Yes
Minimum Tank Size: 55gal
Relative Care: Easy