The Yellowtail Tubelip, also known as Diproctacanthus xanthurus, is a beautiful fish species found in shallow lagoons and sheltered seaward reefs. These striped fish are easy to keep in a Fish-Only aquarium with medium-sized species, but it's essential to provide ample space as they are active swimmers. The Yellowtail Tubelip exhibits mutualistic behavior as juveniles by acting as cleaners for small territorial species, but this ceases as they mature and become corallivorous, feeding exclusively on coral polyps. They have a thick, fleshy lip that forms a short tube when their mouth is closed, giving them their common name "tubelip." The fish are best suited for a tank with plenty of rockwork, a sandy substrate, and clean, well-oxygenated water that incorporates areas of fast water flow.

The Yellowtail Tubelip has a few other common names worldwide, including the Yellowband Tubelip, Yellow Tail Wrasse, and Wandering Wrasse. This small fish species typically grows up to three to four inches long, but juveniles are more commonly available at two inches and under, displaying their juvenile coloration. While the Yellowtail Tubelip is easy to care for, it's essential to understand their dietary needs and behavior, making them unsuitable for reef aquariums. They are an excellent addition to Fish-Only aquariums and are known for their fun-to-watch swimming style. Overall, the Yellowtail Tubelip is a beautiful, striped fish that is sure to be a fascinating addition to any aquarium setup.