Common name: Doubleband Surgeonfish

General Information

The Doubleband Surgeonfish, scientifically known as Acanthurus tennentii, is a striking and active member of the tang family. Recognizable by its elongated body and two distinct horizontal bands running along its sides, this species is a popular choice among aquarists who appreciate its dynamic swimming patterns and unique appearance.

This species is named after the British naturalist James Emerson Tennent, and it has made its way into the aquarium trade due to its vibrant colors and interesting behavior. While not as commonly kept as some other tangs, its distinctive look makes it a prized addition to larger marine aquariums.

Care

Acanthurus tennentii requires a spacious aquarium to accommodate its active swimming habits and potential growth. A tank of at least 400 liters (approximately 100 gallons) is recommended, with plenty of open swimming space and live rock for grazing. This species thrives in well-oxygenated water with stable parameters.

To enrich the environment, consider adding a variety of live rock formations that allow for both exploration and hiding. This not only mimics their natural habitat but also helps reduce stress and aggression.

Diet and Feeding

In the wild, the Doubleband Surgeonfish primarily grazes on algae, making it an important species for controlling algal growth on coral reefs. In captivity, it should be provided with a diet rich in marine algae, supplemented with high-quality flake or pellet foods designed for herbivorous fish.

Offer small portions of food multiple times a day to replicate their natural grazing behavior. Including occasional treats like nori or spirulina can enhance their diet and maintain optimal health.

Behavior and Compatibility

Acanthurus tennentii is generally peaceful but can exhibit territorial behavior, particularly towards other tangs or fish with similar body shapes. Providing ample space and hiding spots can help mitigate aggression.

This species is best kept with other peaceful tank mates and should not be housed with overly aggressive species that may stress or outcompete them for resources.

Health and Common Issues

Doubleband Surgeonfish can live for several years in captivity with proper care. Choosing a healthy specimen involves looking for clear eyes, smooth skin, and active swimming behavior.

Maintaining high water quality and a varied diet is crucial to prevent common ailments such as marine ich or fin rot. Regular monitoring and prompt treatment of any health issues can ensure a long and healthy life for your fish.

Habitat

The natural habitat of Acanthurus tennentii includes the coral reefs and lagoons of the Indian Ocean, particularly around Sri Lanka, the Maldives, and the Chagos Archipelago. These environments are characterized by clear, warm waters and abundant algal growth, which the fish graze on.

To replicate these conditions in an aquarium, ensure stable temperatures, moderate water flow, and a well-established live rock system.