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Pseudorhombus oligodon (Bleeker, 1854)
ROUGHSCALE FLOUNDER
Life   Vertebrata   Fish   Paralichthyidae   Pseudorhombus


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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Animalia  
 Phylum Chordata  
 Class Actinopterygii  
 Order Pleuronectiformes  
 Family Paralichthyidae  
 Genus Pseudorhombus  
  Pseudorhombus oligodon    (Bleeker, 1854) 
Provider: Chen, Jeng-Ping 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Rhombus oligodon   details
Citation: 臺灣魚類誌(沈等, 1993); 中國動物誌-鰈形目(李&王, 1995); Fishes of Japan(Nakabo, 2002)
Character: Dorsal-fin rays 78-82; anal-fin rays 61-66; pectoral-fin rays 12-13. Body deeply ovoid, its depth 2.1 to 2.3 times in standard length. Head length 3.5 to 3.8 times in standard length; upper profile of head distinctly notched in front of upper eye; a line connecting base of first dorsal-fin ray and posterior nostril on eyed side crosses maxilla. Teeth in upper jaw with some canines anteriorly, teeth in lower jaw stronger and more widely spaced than those in upper jaw, with some large canines anteriorly. Lateral line curved above pectoral fins, supratemporal branch extending to between seventh to ninth dorsal-fin rays. Body greenish brown, with a dark blotch at junction between straight and curved portions of lateral line; 2 dark spots at boundary of opercle and trunk below base of pectoral fins. Two dark spots along gill opening below pectoral fin. Dark blotch a beginning of straight part of lateral line. Soft ray count of pectoral fin refers to that on ocular side.  
Habitat: Inhabits muddy and sandy bottoms of the continental shelf. Feeds mainly on small demersal fishes. 
Distribution: Northwest Pacific: southern Japan to the South China Sea. Taiwan: South, North-East, West. 
Utility: Commercial fishery species. Marketed fresh.  
Name Code: 382753
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Pseudorhombus&speciesname=oligodon ---> https://www.fishbase.se/Summary/speciesSummary.php?genusname=Pseudorhombus&speciesname=oligodon
https://www.fishbase.se/Summary/speciesSummary.php?genusname=Pseudorhombus&speciesname=oligodon ---> https://www.fishbase.se/summary/Pseudorhombus-oligodon.html

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Pseudorhombus oligodon (Bleeker , 1854)

Roughscale flounder Add your observation in Fish Watcher
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Pseudorhombus oligodon   AquaMaps   Data sources: GBIF OBIS
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Pictures | Google image Image of Pseudorhombus oligodon (Roughscale flounder) Pseudorhombus oligodon
Picture by The Fish Database of Taiwan

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Pleuronectiformes (Flatfishes) > Paralichthyidae (Large-tooth flounders)
Etymology: Pseudorhombus: Greek, pseudes = false + Greek, rhombos = paralelogram (Ref. 45335 ) .  More on author: Bleeker .

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

Marine; demersal; depth range 30 - 40 m (Ref. 9774 ).   Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northwest Pacific: southern Japan to the South China Sea.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 9774 ); common length : 15.0 cm SL male/unsexed; (Ref. 9774 )

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 78-82; Anal spines : 0; Anal soft rays : 61 - 65; Vertebrae : 38. Two dark spots along gill opening below pectoral fin. Dark blotch a beginning of straight part of lateral line (Ref. 559 ). Soft ray count of pectoral fin refers to that on ocular side.

Biology     Glossary (e.g. epibenthic)

Inhabits muddy and sandy bottoms of the continental shelf (Ref. 9774 ). Feeds mainly on small demersal fishes (Ref. 9774 ). Marketed fresh (Ref. 9774 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Distinct pairing (Ref. 205 ).

Main reference Upload your references | References | Coordinator : Amaoka, Kunio | Collaborators

Masuda, H. and G.R. Allen , 1993. Meeresfische der Welt - Groß-Indopazifische Region. Tetra Verlag, Herrenteich, Melle. 528 p. (Ref. 9137 )

IUCN Red List Status (Ref. 120744 )

    Not Evaluated  

CITES (Ref. 118484 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial FAO(Publication : search ) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969 ): 23.9 - 28.6, mean 28 (based on 95 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Trophic Level (Ref. 69278 ):  4.2   ±0.73 se; Based on food items. Resilience (Ref. 120179 ):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.). Vulnerability (Ref. 59153 ):  Low to moderate vulnerability (32 of 100) . Price category (Ref. 80766 ):   Very high .

Entered by Torres, Armi G. Modified by Garilao, Cristina V. Fish Forum
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