Thompson's Surgeonfish Care Guide
Acanthurus thompsoni · Saltwater Tang
What Thompson's Surgeonfish look like
Thompson's Surgeonfish (Acanthurus thompsoni) exhibits a laterally compressed body shape, reaching a maximum adult size of approximately 12 inches (30 cm) in length. The species is characterized by its vibrant blue body adorned with yellow accents, particularly prominent on the dorsal and anal fins, which are elongated and pointed. Notable features include a prominent, sharp caudal spine on either side of the tail, serving as a defensive adaptation against predators. The fish possesses a distinct lateral line that runs along the length of its body, aiding in the detection of water movements. Sexual dimorphism is subtle, with males typically displaying slightly more vivid coloration and larger dorsal fins during breeding periods.
Behavior & temperament
Thompson's Surgeonfish are generally social and are often found in small to medium-sized schools, exhibiting a clear social hierarchy. They inhabit the upper water column of coral reefs, frequently engaging in grazing behavior on algae and detritus. Breeding occurs in pairs or small groups, with males displaying territorial behavior during courtship. Their temperament is generally peaceful, although they can exhibit aggression towards conspecifics or other tangs, particularly in confined spaces. They are known to establish and defend feeding territories, which can lead to displays of dominance.
Diet & feeding
In the wild, Thompson's Surgeonfish primarily feed on algae and detritus, making them herbivorous grazers. In captivity, they require a diet rich in marine algae, high-quality herbivore pellets, and occasional vegetable matter such as spirulina and nori.
Behind the name
The genus name 'Acanthurus' is derived from the Greek words 'akanthos,' meaning thorn, and 'oura,' meaning tail, referring to the sharp spines located on the tail. The species name 'thompsoni' honors the naturalist and explorer William Thompson.
Plan your tank
Check the numbers before you buy: tank volume, salinity, salt mix, water changes, and your ongoing care routine.
Keeping Thompson's Surgeonfish?
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