
Source: Wikimedia Commons
Acanthurus achilles
A Pacific island surgeonfish with a near-black body set off by an orange teardrop on the tail base and an orange tail. Lives in shallow surge zones and needs strong flow and high oxygen; a species for experienced keepers.
The Achilles Tang (Acanthurus achilles) is a surgeonfish of Pacific islands such as Hawaii and Pitcairn, and of the eastern Pacific off southern Baja California. A near-black purplish body is set off by an orange teardrop on the tail base, an orange tail and orange-and-white fin edges; juveniles have a streak rather than a teardrop. FishBase records a maximum of 24cm (total length); it lives on surge-exposed outer reefs at 0-10m (usually 0-4m) and grazes benthic algae. It is demanding in captivity and a major overseas retailer rates it expert only. Strong flow, high oxygen and a tank of 680L or more are prerequisites, and shipping or water-quality stress readily triggers marine ich. Quarantine before introduction and feed seaweed-based foods several times a day. It is aggressive toward other tangs but peaceful with other families and does not harm corals. There is no standard Japanese name; it is traded under the English-derived name Achilles Tang.
Source: Wikipedia (CC BY-SA 4.0)
The Achilles Tang grows to Up to 24cm.
The ideal temperature for the Achilles Tang is 22〜26℃.
Origin
Pacific islands (Hawaiian and Pitcairn archipelagos) and the eastern Pacific (southern Baja California and offshore islands)
Size
Up to 24cm
Temperature
22〜26℃
Sources: LiveAquaria / FishBase
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
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Seaweed, algae-based pellets, dried nori
Exceptionally prone to marine ich and sensitive to shipping and water-quality stress. Always quarantine; best left to experienced keepers.
A tank of 680L or more is recommended. A surge-zone fish, so provide strong flow and high oxygenation.
22-26C, pH 8.1-8.4, specific gravity 1.020-1.025. Keep water stable and nitrate low.
Primarily herbivorous. Offer dried seaweed several times a day, supplemented with algae pellets. Loses condition quickly if underfed.
Aggressive toward other tangs but peaceful with other families. Safe with corals and invertebrates.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Achilles Tang is 22〜26℃. Avoid sudden temperature changes and maintain a stable environment.
Achilles Tang typically reaches Up to 24cm as an adult. Size may vary depending on care conditions and individual genetics.
Achilles Tang feeds on: Seaweed, algae-based pellets, dried nori. Aim for a balanced diet with appropriate feeding frequency.
The price of Achilles Tang varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 15, 2026