Doubleband surgeonfish
species of fish
The doubleband surgeonfish or lieutenant tang (Acanthurus tennenti) is a marine ray-finned fish in the family Acanthuridae. It is found in tropical and sub-tropical Indo-Pacific regions and can grow to be up to 50 cm (19.7") long.
Physical Description
The Doubleband Surgeonfish is a deep-bodied, laterally-compressed oval fish, with a body length over half its depth. It grows to an average length typically ranging between 25 cm (10 in) and 31 cm (12 in). Both male and female Doublebands are similar in appearance until they reach their breeding season, when the mature male takes on more vibrant hues or darker streaks to attract a mate. Coloration amongst the species can vary, ranging from orange-beige, olive-tan or steely grey, but can turn a dark-brown shade with hints of red or purple when stressed. A dark line runs along the base of the dorsal fin with a similar line at the base of the anal fin. There are two dark streaks behind the eye, with blackish scalpel-like scales that project from the caudal peduncle surrounded by a large black spot with a bluish border. Both dorsal and anal fins are long, extending out to the caudal peduncle. The caudal fin is crescent-shaped and continues to grow longer as the fish ages.
“Doubleband surgeonfish” enters the record as species of fish. Crown Archives preserves that source wording while asking what Doubleband, surgeonfish and species can confirm, complicate or overturn.
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“Doubleband surgeonfish” is worth following because a concise public description often conceals a longer documentary argument. Here, Doubleband, surgeonfish and species provides the most credible route into that argument.
The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated May 21, 2026. The linked authority identifier is Q266394. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Doubleband surgeonfish” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.