The Spotted Watchman Shrimpgoby, Cryptocentrus sp. is also known as the False Yellow Watchman or False Yellow Shrimpgoby. They are famous for their symbiotic relationship with shrimps to secure their burrows, mostly pistol shrimp. The Watchman thrives in tanks with plenty of live rock, a sandy substrate, and a tightly sealed lid to prevent escapes. Only one should be kept in each aquarium unless it is in a very large tank as they can become territorial. They will feed on a varied carnivorous diet and are known to be able to spawn in home aquariums. Males and females differ slightly as the females have a more muted yellow coloration. The Watchman also has a wonderful "frown" on its face making it seem constantly grumpy. Overall, this is one of the best all-around fish you can have in your tank. It is easy to care for, hardy, fun to watch, beautiful, and a wonderful tank mate.