Acanthurus tennenti 9-11 cm

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Acanthurus tennenti: the Horseshoe Surgeonfish, a Robust and Elegant Herbivorous Fish

The Acanthurus tennenti, nicknamed the Horseshoe Surgeonfish, is a marine fish appreciated for its elegant silhouette and great efficiency as an algae grazer. This fish, with the ovaloid morphology typical of the Acanthuridae family, features a beige body with bluish reflections, enhanced by a vivid blue outline at the caudal scalpel, which earns it the evocative nickname "horseshoe."

As an adult, the Acanthurus tennenti can reach up to 30 cm in length, making it an impressive fish for reef aquariums. In its natural habitat, it thrives in lagoons and reefs rich in algae, either alone or in small schools, where it spends its days grazing on benthic surfaces.

Stable Behavior and Selective Cohabitation

In an aquarium, the Horseshoe Surgeonfish generally adopts a peaceful behavior, although it may be intolerant towards its conspecifics or other fish with a similar morphology. Therefore, it is preferable to keep it alone among other surgeonfish, but it cohabitates very well with other species that are behaviorally and morphologically distant.

This fish needs a clear swimming space to move freely. A minimum volume of 450 liters is required for the aquarium, with good oxygenation, rocks for grazing, and moderate water circulation.

An Herbivorous Diet Not to Be Overlooked

The Acanthurus tennenti is a strict herbivore. Although it naturally consumes the algae present on live rocks, specific dietary supplements are essential to ensure its long-term health.

Its diet should include nori algae, vegetable pellets, spirulina, and possibly some marine-origin protein supplements, such as mysis or brine shrimp, occasionally. A good diet enhances its resistance, supports digestion, and highlights the subtle shades of its body.

A Robust Fish After Acclimatization

Once acclimatized in good conditions, the Horseshoe Surgeonfish becomes a robust, very active, and not easily frightened fish. Its presence and stable behavior make it an excellent choice for aquarists looking to combine utility and aesthetics in their reef aquarium.

For surgeonfish enthusiasts, the Acanthurus tennenti is a true marine good luck charm: an elegant companion, effective against algae, and ideal in a well-thought-out tank starting at 450 liters.