Zebrasoma rostratum

Datasheet

General Description

The Longnose surgeonfish, also known as the Longnose tang, is a member of the Zebrasoma genus within the Acanthuridae family. These surgeonfish are highly sought after for coral aquariums due to their vibrant colors and ease of care. They are distinguished by a sail-like fin that is displayed when threatened by other fish, with the only notably aggressive species in this genus being Zebrasoma xanthurum.

Aquarium Suitability

Longnose surgeonfish are suitable for most aquarium settings, as they are generally peaceful towards other fish. However, caution should be exercised when adding multiple aggressive species to the same tank, as it may lead to stress-related issues. It is recommended to establish a hierarchy by adding the most aggressive species last and providing ample hiding spaces for individual territories.

Demands

Longnose surgeonfish have average hardiness and require specific water conditions to thrive. Maintaining a stable pH between 8.1-8.4, a temperature range of 22.2-25.6°C, a dKH of 8-12, and a salinity level of 1.020-1.025 is essential for their well-being.

Care and Hardiness

These fish need a well-established aquarium with plenty of live rocks for grazing algae. Their diet primarily consists of algae-based foods like seaweed and spirulina, supplemented with frozen foods to ensure a balanced nutritional intake. They also require ample swimming space and hiding spots within the tank.

Reef Suitability

Longnose surgeonfish are known to be reef safe and typically do not pose a threat to corals or invertebrates. However, large Paletail Blue tangs can be an exception to this behavior.

Aquarium Setup

To set up an ideal environment for Longnose surgeonfish, a tank size of at least 300 liters is recommended. Providing hiding places between live rocks, a well-maintained algae-covered substrate, and a mix of algae-rich foods is crucial for their health and happiness in captivity.

Behaviour

In an aquarium setting, Longnose surgeonfish spend most of their time swimming and grazing on algae. They are generally peaceful towards other fish but may display aggression towards similar species, especially during territorial disputes.

Feeding and Diet

Their diet should consist primarily of macroalgae like seaweed or nori, along with microalgae such as spirulina. Regular supplementation with frozen foods containing small crustaceans like krill or artemia is beneficial for their overall health.

Dimorphism

Longnose surgeonfish may exhibit subtle differences in coloration between males and females, but distinguishing characteristics for sexual dimorphism are not prominent in this species. Captive reproduction of these fish is not commonly documented.

Habitat and Distribution

Longnose surgeonfish are native to the Eastern Central Pacific region, specifically found in areas like the Line Islands, Marquesas Islands, Society Islands, Tuamotu Islands, and the Pitcairn Group (Ducie Islands). Their natural habitat includes coral reefs where they forage for algae and seek shelter among rocks and crevices.