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Sargocentron diadema  (Lacepède, 1802)

Crown squirrelfish
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Sargocentron diadema
Picture by Randall, J.E.


Australia country information

Common names: Crown squirrelfish
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Including Lord Howe Island (Ref. 1602) and Territory of Ashmore and Cartier Islands (Ref. 75154). Museum: Western Australia: Rowley Shoals, NTM S.11222-009; Scott Reef, AMS I.21316-022, NTM S.11313-016, S.11381-049. Ashmore Reef, NTM S.11973-043. Queensland: Cape Melville, AMS I.20774; Great Barrier Reef, Raine I., AMS I.20756-025; Escape Reef, AMS I.22573-017, I.22631-005; Lizard I., AMS I.21422-111, LACM 37032-1. Capricorn, One Tree I., AMS I.15681-001. New South Wales, Sydney Harbor, Parsley Bay, AMS I.8254-001. Chesterfield Bank, BPBM 33755 (Ref. 27370). Also Ref. 33390, 90102.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Johnson, J.W., 1999
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Beryciformes (Sawbellies) > Holocentridae (Squirrelfishes, soldierfishes) > Holocentrinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 17.0 cm TL male/unsexed; (Ref. 30874)

Environment

Marine; reef-associated; depth range 1 - 60 m (Ref. 27370), usually 2 - 30 m (Ref. 30573)

Climate / Range

Tropical; 30°N - 33°S, 27°E - 128°W

Distribution

Indo-Pacific: Red Sea and East Africa to the Hawaiian and Pitcairn islands, north to the Ryukyu and Ogasawara islands, south to northern Australia and Lord Howe Island. Throughout Micronesia (Ref. 1602).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 11; Dorsal soft rays (total): 12-14; Anal spines: 4; Anal soft rays: 8 - 9. Body with alternating broad red and narrower silvery white stripes (Ref. 4201); red head with 2 vertical white streaks on the opercle, one on its edge and an oblique one below the eye; distinctive reddish-black to black dorsal fin with two white streaks. Five or 6 oblique rows of scales on cheek. Maxilla nearly reaching or extending slightly beyond a vertical at anterior edge of the pupil; upper jaw length 2.75-2.95 in head length. Body depth 2.75-3.25 in SL; head length 2.7-3.15 in SL; snout length 4.0-4.4 in head length; interorbital width 4.4-4.9 in head length; premaxillary groove extending slightly posterior to a vertical at anterior edge of orbit; anterior end of nasal bone rounded; medial margin of nasal bone without spinule; nasal fossa without spinules on its edge; upper edge of suborbital bones below anterior half of eye spineless; small preopercular spine, its length 2-3 times in orbit diameter, 2.85-3.5 in head length; longest 4th dorsal spines, 1.7-2.25 in head length; third anal spine 1.2-1.35 in head length (Ref. 27370).

Biology     Glossary (e.g. epibenthic)

A common species that inhabits shallow coral reefs (Ref. 58534) and lagoon and seaward reefs to depths of 30 m or more. Benthopelagic (Ref. 58302). Occurs under ledges or in crevices during the day and feeds on isopods; at night it roams over open sand and low-profile reef areas to feed on polychaetes and small crabs. Stomach contents listed gastropods (e.g. Atys sp.), polychaetes, small clams, solenogastrid, isopods, brachyuran crabs, and other crustaceans (Ref. 27370). Tends to occur in aggregations (Ref. 30573). Venomous spine on its preopercle. Size rarely exceeds 13 cm. Minimum depth reported taken from Ref. 30874.

IUCN Red List Status (Ref. 115185)

Threat to humans

  Venomous (Ref. 2334)



Human uses

Fisheries: minor commercial; aquarium: commercial

More information

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Internet sources

BHL | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | ECOTOX | FAO(Publication : search) | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | National databases | Public aquariums | PubMed | Scirus | Sea Around Us | SeaLifeBase | Tree of Life | uBio | uBio RSS | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record | Fishtrace

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.4   ±0.2 se; Based on diet studies.

Resilience (Ref. 69278)
High, minimum population doubling time less than 15 months (K=1.13)

Vulnerability (Ref. 59153)
Low vulnerability (10 of 100)
Price category (Ref. 80766)
Medium