The Blue Streak Watchman Shrimpgoby (Cryptocentrus cyanotaenia), also known as the Lagoon Shrimpgoby, shares close resemblance to the Yellow Watchman Goby (Cryptocentrus cinctus) except for the blue markings, which are a striped blue pattern near the gills and face. They are known to form a symbiotic relationship with shrimps to secure their burrows. As is true for many Watchman Gobies, they thrive 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. The Blue Streak Watchman 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. It 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.