orangespot surgeonfish

Acanthurus olivaceus
Family Acanthuridae
Genus Acanthurus
IUCN category (World) LC
Acanthurus olivaceus Acanthurus olivaceus

Introduction

Descriptor : Bloch & Schneider, 1801

The orangespot surgeonfish is a tropical species found in a large part of the Indo-Pacific region. It is also observed in the Great Barrier Reef.

Who is it?

Morphology

  • Type
  • Average size
    28 cm
  • Maximum size
    35 cm
  • Longevity
    5 year
  • Shape
    Ovoid
  • Type
  • Average size
    28 cm
  • Maximum size
    35 cm
  • Longevity
    5 year
  • Shape
    Ovoid

How to recognize This fish ?

This species is easily recognizable by the large horizontally elongated orange spot behind the eye. The body of this species is strongly laterally compressed and rather oval in shape.

The orangespot surgeonfish is bicolor with a sharp vertical demarcation. The front of the body is light olive green, while the back is much darker. The orange spot is surrounded by a wide band, sometimes visible, with purple reflections.

Sexual dimorphism

No known dimorphism.

Behaviour & Life cycle

  • diet
    herbivorous
  • Sociability
    living in a group or alone
  • territorial
    Yes
  • Way of living
    diurnal

This lively fish feeds on superficial algae (diatoms, filamentous), on reefs. It is observed in groups or solitary.

It is a temperamental fish that does not appreciate the presence of intruders in its habitat. It can be particularly aggressive towards other territorial species and can engage in fierce battles. It is generally more tolerant of non-territorial fish.

Reproduction

  • Reproduction
    ovipare qui pond en eau libre

This fish spawns in open water. Like other surgeonfish, the eggs are carried by currents once spawning is done, and the larvae develop in the ocean floor before joining the reefs (as juveniles).

Harmless species

This species poses no particular danger to humans if encountered in its natural environment.

Origin and distribution

Geographic distribution & Conservation

Acanthurus olivaceus mainly lives near coral reefs, on sandy or coral debris bottoms, between 9 and at least 46 meters deep. Juveniles can be found in protected bays and lagoons, alone or in small groups, from 3 meters. Adults are solitary or in schools. Their diet mainly consists of organic debris and limestone sediments, with very few identifiable seaweed.

Conservation status of populations (IUCN)

World : LC

Where to see this species?

What is its habitat?

Natural environment characteristics

  • Temperature
    23 - 27 °C
  • Depth
    1 - 50 m

Biotope presentation

The orangespot surgeonfish is most commonly found at depths of less than 50 meters. However, it is not impossible to find this fish at other depths.

Species of the same biotope

Main recommendations for fishkeeping

Deontology

In order to preserve wildlife, if you acquire this animal, it must not be released into the wild. See also, the Fishipedia charter.

Fishipedia supports the practice of responsible and environmentally friendly aquarium keeping. We encourage maintenance if it is motivated by a desire to understand the biological functioning of living things and if it is done with respect for animal life.

We believe that aquaristics is an opening to the discovery of aquatic environments, especially freshwater, and that this knowledge is necessary to better protect and respect these environments. Logically, we refute the compulsive purchase of animals that would not find a sufficient and / or adapted place in the host aquarium.

Our recommendations

  • Min volume
    800 liters
  • Population min
    1
  • Temperature
    23 - 27 °C
  • pH (acidity)
    8.2 - 8.4

Characteristics

  • Difficulty breeding
    moderate
  • Robustness
    tolerant
  • Behaviour
    moderately aggressive
  • Availability
    standard

General reminders

It is strongly advised to read the complete dedicated file and to get information on the feedbacks of maintenance of the envisaged animal, this to avoid any potential conflict whose end result is generally the death of the individual (or the other inhabitants). It is important not to overload your aquarium to limit pollution. This will make maintenance easier.

The realization of a seawater aquarium requires certain knowledge beforehand. Seawater is generally synthetic, consisting of reverse osmosis water and synthetic salt at a level of 33g / liters. It is also possible to take seawater directly (after making sure that the water is not polluted). The operation of a seawater aquarium is done in three phases: the installation of a living stone decoration, the introduction of invertebrates one month later, and the introduction of fish 3 months later. It is essential to wait as long as possible before to introduce the animals so that the micro-fauna has had time to develop well. The balance and the physico-chemical stability are fundamental for the success of this type of tank.

General reminder on maintenance datas

Le démarrage d'un aquarium est une partie primordiale pour l'équilibre et le bien-être des poissons. Lorsque l'on met en eau un aquarium, l'eau passe naturellement par un cycle biologique : le cycle de l'azote. Celui-ci dure environ trois semaines. Tous les 2 jours, nous vous conseillons de tester votre eau jusqu'à ce que le taux de nitrite soit à zéro pendant plusieurs jours d'affilée.

Pour accélérer ce cycle, vous pouvez utiliser un activateur de bactéries comme JBL Denitrol. Cette solution riche en bactéries vivantes et enzymes permet une mise en place rapide du cycle de l'azote. Les poissons peuvent alors être introduits plus rapidement.

Il est important de tester l'eau de son aquarium régulièrement pour maintenir un environnement sain pour les poissons et les autres habitants. Les tests d'eau permettent de mesurer les niveaux de différents paramètres tels que le pH, la dureté totale, ainsi que les taux de nitrates, de nitrites et d'ammoniaque.

Pour réaliser ces tests, vous pouvez utiliser des produits d'analyse spécialisés tels que JBL ProScan qui permet de réaliser un diagnostic de l'eau directement via un smartphone. Il existe également des coffrets de tests plus classiques de bandelettes, comme JBL PROAQUATEST.

En cas d’usage de l’eau du robinet, vous pouvez utiliser un conditionneur d’eau de type Biotopol de JBL pour éliminer les substances nocives comme le chlore, le cuivre, le plomb et le zinc. Une eau trop dure ou trop calcaire peut être inadaptée à de nombreuses espèces tropicales d’eau douce. Si nécessaire, vous pouvez la couper avec de l’eau osmosée ou de pluie filtrée afin d’obtenir une dureté plus adaptée aux besoins de vos poissons et de vos plantes. Les conditionneurs d'eau garantissent une meilleure santé aux poissons et une meilleure croissance des plantes.

Chlorine and chloramine are dangerous for the health of animals. Used to disinfect water, these agents are present in significant quantities in tap water. We recommend using an anti-chlorine agent every time you change the water. In addition to chlorine, treatments and medicines sold for aquarium use sometimes contain dangerous heavy metals in high doses.

Specific needs for the orangespot surgeonfish

The orangespot surgeonfish is a marine species which lives naturally at a temperature between 23 °C and 27 °C. Nitrate levels should remain below 50mg/L. To keep the water clean and unpolluted, plan on changing 20% to 30% of the water volume each month. In seawater, it is also possible to remove nitrates using one of the following methods: Jaubert, denitrator on sulfur, biopeletts, vodka method.

The breeding of this species is accessible on condition of being well informed about its needs in aquarium . Any cohabitants must be chosen with care to avoid the loss of animals.

Formal incompatibilities

Be careful, the orangespot surgeonfish is incompatible with algae.

Cohabitation & Environment

In a community aquarium context, this species should be kept in a minimum volume of 800 liters.

The orangespot surgeonfish has a particular lifestyle that is not inherently compatible with many of its neighbors. Very active and sometimes aggressive, it highly can disturb shy species, especially in inadequate water volumes.

Tips for feeding

The orangespot surgeonfish is herbivorous.

This species can eat dry food (flakes, pellets), fresh food and frozen food. To avoid deficiencies, it is recommended to vary the types of food.

Feed animals in moderation to maintain good water quality. Meals should be eaten within 2–3 minutes, served in several small portions rather than a single large ration.

Uneaten food quickly decomposes, releasing ammonia, nitrites, and nitrates, which disturb the aquarium’s biological balance.

Make sure each species can access food properly, slower or bottom-dwelling individuals may require targeted feeding.

Reproduction protocol

  • egg-laying protection
    No

Hybridization risks

In general, it is advised not to mix several species of the same genus or different varieties of the same species, to avoid the risks of hybridization.

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Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Benoit Chartrer

Benoit Chartrer

Adrien Falzon

Adrien Falzon

Translation

Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

Marine Kassel

Marine Kassel

Bibliographic references

  • - GBIF
  • - APPORTS ONTOGENIQUES ALA PHYLOGENIE DES POISSONS CHIRURGIENS (Famille: Aca.nthuridae) - Brice QUENOUILLE - MNHM - 1996. MÉMOIRES DE STAGE SCIENCES DE LA MER BIOLOGIE MARINE, Michel KULBICK, Nouméa: ORSTOM. Mai 1996. 38 p
  • - The Goldrim Surgeonfish - - 0.

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Species of the same biotope

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