Doryrhamphus and Dunckerocampus, popularly known as flagtail pipefish, are two genera of fishes in the Syngnathidae family. They are found in warm, relatively shallow waters of the Indo-Pacific, with a single species, D. paulus, in the eastern Pacific. Most of these pipefishes are very colourful, and are fairly popular in the marine aquarium hobby despite requiring special care and not being recommended for beginners.