Overview

Comprehensive Description

Biology

Found over sand and coral bottoms of clear channels (Ref. 9710). Juveniles probably occur on reef flats (Ref. 9710). Rare and not commercial (J.E. Randall, pers. comm.).
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Distribution

Western Pacific: Kapingamarangi Atoll, Caroline Islands. Possibly endemic of that atoll. Reports from other areas are likely misidentifications of the juvenile stages of Acanthurus pyroferus (J.E. Randall, pers. comm.), e.g. from Taiwan (Shao et al., 2008).
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Western Pacific.
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Physical Description

Morphology

Dorsal spines (total): 8; Dorsal soft rays (total): 26; Analspines: 3; Analsoft rays: 24
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Size

Max. size

28.0 cm TL (male/unsexed; (Ref. 37792))
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Diagnostic Description

Caudal fin lunate. Life colour unknown. Preserved specimen is dark brown with two small oval spots, one above and the other slightly behind the upper end of the gill opening, and a dark brown band at the base of the dorsal fin.
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Ecology

Habitat

Environment

reef-associated; marine; depth range 0 - 6 m (Ref. 37792)
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Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 3 samples.

Environmental ranges
  Depth range (m): 1.83 - 17
  Temperature range (°C): 28.793 - 29.282
  Nitrate (umol/L): 0.059 - 0.156
  Salinity (PPS): 34.134 - 34.323
  Oxygen (ml/l): 4.441 - 4.517
  Phosphate (umol/l): 0.092 - 0.163
  Silicate (umol/l): 1.097 - 1.476

Graphical representation

Depth range (m): 1.83 - 17

Temperature range (°C): 28.793 - 29.282

Nitrate (umol/L): 0.059 - 0.156

Salinity (PPS): 34.134 - 34.323

Oxygen (ml/l): 4.441 - 4.517

Phosphate (umol/l): 0.092 - 0.163

Silicate (umol/l): 1.097 - 1.476
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Conservation

Threats

Vulnerable (VU) (D2)
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: commercial
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Wikipedia

Acanthurus chronixis

Acanthurus chronixis is a tropical fish known commonly as the Chronixis surgeonfish or the Mimic surgeonfish.[2] It was first named by Randall in 1960.[3] The species lives in coral reefs in the western Pacific.[4]

References

  1. ^ Myers, R., Choat, J.H., Abesamis, R., Clements, K.D., McIlwain, J., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B. 2012. Acanthurus chronixis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 09 January 2013.
  2. ^ Common names for Acanthurus chronixis at www.fishbase.org.
  3. ^ Page 29, Surgeonfishes of the world, by John E. Randall. Mutual Pub., 2001. ISBN 1-56647-561-9/ISBN 978-1-56647-561-7
  4. ^ Acanthurus chronixis at www.fishbase.org.
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