Regal blue tangs are found mostly in the Indo-Pacific. The Philippines, Japan, Florida and Costa Rica are a few of these places. Its diet is mostly of plankton, but they also eat algae. Owning a "Dory" fish is not recommended, for they can cause swelling, inflammation, discoloration, and severe bleeding. The regal blue tang has other names including the Royal Blue Tang Fish, the palette surgeonfish (due to its surgeon's scalet-shaped tail), Indo-Pacific Bluetang, Dory, Flagtail Surgeonfish, Hepatus Tang, Blue Surgeonfish, Regal Blue Surgeonfish, and a few others. A blue tang can live up to 20 years if in captivity.