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Overview

Comprehensive Description

Biology

Adults occur close to shore in rocky or dead reef areas where visibility is often reduced due to silting and wave action. Territorial, they maintain and 'weed' filamentous algae patches growing on dead coral (Ref. 9710). Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Distribution

Indo-Pacific: Ryukyu Islands, encompassing the Indo-Malayan Archipelago, Western Australia north of Abrolhos Islands; reaching eastward along the northern margin of the tropical Indian Ocean to Sri Lanka and India.
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Indo-West Pacific.
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Physical Description

Morphology

Dorsal spines (total): 13; Dorsal soft rays (total): 14 - 16; Analspines: 2; Analsoft rays: 12 - 14
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Size

Maximum size: 120 mm SL
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Max. size

12.0 cm SL (male/unsexed; (Ref. 7247))
  • Allen, G.R. 1991 Damselfishes of the world. Mergus Publishers, Melle, Germany. 271 p. (Ref. 7247)
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Diagnostic Description

Diagnosis: Body and median fins generally brown to nearly black; body paler ventrally; fins grading to smoky gray distally. Margin of scales on sides with blackish streak, appearing as series of transverse bands; few small blue spots scattered on head and sides. Pelvic and anal fins bright blue anteriorly. Lips dusky brown (Ref. 510). Body depth 1.7-2.2 in SL (Ref. 90102).
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Ecology

Habitat

Environment

reef-associated; non-migratory; marine; depth range 2 - 10 m (Ref. 9710)
  • Lieske, E. and R. Myers 1994 Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. (Ref. 9710)
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Depth range based on 6 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 2 - 6
  Temperature range (°C): 27.306 - 27.306
  Nitrate (umol/L): 0.365 - 0.365
  Salinity (PPS): 34.253 - 34.253
  Oxygen (ml/l): 4.577 - 4.577
  Phosphate (umol/l): 0.171 - 0.171
  Silicate (umol/l): 3.666 - 3.666

Graphical representation

Depth range (m): 2 - 6
 
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Depth: 2 - 10m.
From 2 to 10 meters.

Habitat: reef-associated.
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Trophic Strategy

Occurs inshore (Ref. 75154). Found close to shore in rocky or dead reef areas where visibility is often reduced due to silting and wave action (Ref. 9710).
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Life History and Behavior

Life Cycle

Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
  • Breder, C.M. and D.E. Rosen 1966 Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. (Ref. 205)
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Stegastes obreptus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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