Crossorhombus azureus, Blue flounder

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Crossorhombus azureus (Alcock, 1889)

Blue flounder
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Crossorhombus azureus   AquaMaps   Data sources: GBIF OBIS
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Image of Crossorhombus azureus (Blue flounder)
Crossorhombus azureus
Picture by CSIRO

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Pleuronectiformes (Flatfishes) > Bothidae (Lefteye flounders)
Etymology: Crossorhombus: Greek krossoi = tassel + Greek, rhombos = paralelogram (Ref. 45335).
More on author: Alcock.

Environment: milieu / climate zone / depth range / distribution range Ecologie

marien demersaal; diepte 13 - 60 m (Ref. 9824). Tropical

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Indo-West Pacific: Bay of Bengal, northwestern Australia, South China Sea, China, Taiwan, Japan, Viet Nam, and Aru Islands, Indonesia.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 18.0 cm TL mannelijk / geslacht onbekend; (Ref. 9824)

Korte beschrijving Morfologie | Morfometrie

Dorsale zachte stralen (totaal): 84-92; Anale zachte stralen: 63 - 74. Ground colour on eyed side brownish grey, with darker spots and blotches. Fins paler than body, dorsal and anal fins with small dark spots, caudal fin with 2 distinct dark bands. Males with small dark spots in anterior part of interorbital region. Blind side whitish in females. Males with distinct bluish black pyriform colour pattern on blind side. Body ovoid, its depth 1.7 to 2 times in SL. Head small, snout shorter than eye, profile steep anterior to interorbital area. Head length 3.3 to 4.5 times in SL. Interorbital region broad and concave, wider in males than females in specimens greater than about 6 cm SL. Males with a rostral spine and 1 to 3 low bony bumps around orbits. Both eyes on left side of head, front margin of upper eye slightly behind front margin of lower eye. Both eyes in males larger than about 6 cm SL with a flap on posterior area. Mouth small, reaching to or slightly beyond anterior margin of lower eye, length of upper jaw 3.1 to 4.3 times in head length. Teeth in upper jaw biserial, teeth of outer row more widely spaced than teeth of inner row; teeth in lower jaw uniserial. Gill rakers short and pointed. Scales on eyed side with long ctenii. Pectoral fin on eyed side with 11 to 14 rays, its length 1.3 to 1.6 times in head length in both sexes. Pectoral fin on blind side with 9 to 12 rays (Ref 42535).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Lives on mud bottoms and feeds on bottom-living animals (Ref. 9824). Sexually dimorphic characters develop at about 6 cm SL (Ref. 9824).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Hoofdreferentie Upload your references | Referenties | Coördinator : Amaoka, Kunio | Medewerkers

Sainsbury, K.J., P.J. Kailola and G.G. Leyland, 1985. Continental shelf fishes of the northern and north-western Australia. An illustrated guide. CSIRO Division of Fisheries Research; Clouston & Hall and Peter Pownall Fisheries Information Service, Canberra, Australia. 375 p. (Ref. 3131)

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 11 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van geen belang
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Estimates based on models

Preferred temperature (Ref. 123201): 23.6 - 28.8, mean 27.2 °C (based on 460 cells).
Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00408 - 0.02036), b=3.05 (2.87 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.5   ±0.37 se; based on food items.
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).