Paracanthurus hepatus - Known as the blue hippo tang, regal tang, blue tang, palette tang, and of course, "Dory". This beautiful fish is royal blue, with a black palette pattern on the side and a yellow tail. Of the thousands of fish available to the trade, this is one of the most popular of them all! It can be shy, especially when first introduced to the aquarium, and should be provided with branching corals or some other suitable shelter sites. This tang will lie on is side (often startling those unaware of it's behavior) if it cannot find a suitable hiding place, or when first introduced into the aquarium. This species is usually more docile than many other Surgeonfishes, and gets along great in a peaceful community tank or reef. Juveniles can be kept in the same tank, but adults often quarrel, unless the tank is very large and they are introduced together.