Largetooth flounder (Pseudorhombus arsius)
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General data

Main name: Largetooth flounder
Climates: Tropical, Subtropical
Habitat: Saltwater
Native: Asia, Africa, Australia & Oceania
Distribution: Pacific Ocean, Indian ocean

Classification

Genus: Pseudorhombus - Pseudorhombus
Family: Paralichthyidae - Large-tooth flounders
Order: Pleuronectiformes - Flatfishes
Class: Teleostei - Ray-finned fishes
Superclass: Osteichthyes - Bony fishes

Description

Pseudorhombus arsius, the largetooth flounder, is a species of left-eyed flatfish. As an adult, the dark side of its body, where its eyes are located, is on the left side. It belongs to the family Paralichthyidae. As Rhombus polyspilos, it was named as the type species of the genus Pseudorhombus. It is an Indo-Pacific species and is caught by both recreational and commercial fisheries. Pseudorhombus arsius has an oval-shaped body which has a depth which is 1.8 to 2.3 times its standard length. The head has a slight notch in front of its upper eye. The eyes are on the left side and have a diameter which is a fifth of the length of the head and the snout has a length equal to or slightly greater than the diameter of the eye. The dorsal fin starts in front of its upper eye and of the nostrils on blind side. The mouth forms a deep cleft with the maxilla normally almost half the length of the head. The jaws and teeth are nearly equally developed on both jaws. The upper jaw reaches to below the posterior edge of the lower eye. There are several pairs of moderately large caniform teeth in the anterior parts of both jaws, which are of unequal size and arranged in a single row. These number 5 to 8 in the lower jaw on the eyed side, and 6 to 13 lateral teeth in lower jaw of blind side which are more robust and more widely spaced than those of upper jaw. The gill rakers are pointed, longer than they are broad. It has simple fin-rays which number 71–84 in the dorsal fin, 53–62 in the anal fin and 11–13 in the pectoral fin. The lateral line curves above the pectoral fin has 69-81 scales and there are 36 vertebrae. In the dorsal fin, the longest rays are found in the posterior third and only the rearmost three or four rays are branched, as at the last five anal fin rays. Two dark spots are situated on the central part of its dorsal surface, one just to the posterior of the pectoral fin and the second is midway between the forward spot and the tail. The body is greenish to pale brownish in colour and is normally marked with variously sized rings, and there is frequently two dark blotches on the straight and the curved sections of the lateral line with a smaller blotch which is half-way to the caudal-fin peduncle. It can vary the colour of the body so that it closely matches the surface the fish rests on. They grow to 50 cm, but 30 cm in length is the more usual size.

Catches

Taxonomy of Fishes

Osteichthyes - Bony fishes->
- Coelacanthi - Lobe-finned fishes->
- Teleostei - Ray-finned fishes->
  - Perciformes - Perches->
  - Cypriniformes - Carps->
  - Esociformes - Pikes->
  - Salmoniformes - Salmons and Trouts->
  - Siluriformes - Catfishes->
  - Scorpaeniformes - Mail-cheeked fishes->
  - Gasterosteiformes - Sticklebacks->
  - Gadiformes - Cods->
  - Anguilliformes - Eels and morays->
  - Clupeiformes - Herrings->
  - Syngnathiformes - Pipefishes and Seahorses->
  - Gobiiformes - Gobies->
  - Mugiliformes - Mullets->
  - Carangiformes - Jacks->
  - Beloniformes - Needlefishes->
  - Labriformes - Wrasses->
  - Scombriformes - Mackerels->
  - Mulliformes - Goatfishes->
  - Pleuronectiformes - Flatfishes->
    
    Pleuronectidae - Righteye flounders->
    
    Soleidae - Soles->
    
    Paralichthyidae - Large-tooth flounders->
    
    Paralichthys - Paralichthys->
    
    Citharichthys - Citharichthys->
    
    Ancylopsetta - Ancylopsetta->
    
    Cephalopsetta - Cephalopsetta->
    
    Gastropsetta - Gastropsetta->
    
    Hippoglossina - Hippoglossina->
    
    Pseudorhombus - Pseudorhombus->
    
    Ringed flounder (Pseudorhombus annulatus)
    
    Peacock flounder (Pseudorhombus argus)
    
    Largetooth flounder (Pseudorhombus arsius)
    
    Pseudorhombus binii (Pseudorhombus binii)
    
    Cinnamon flounder (Pseudorhombus cinnamoneus)
    
    Pseudorhombus ctenosquamis (Pseudorhombus ctenosquamis)
    
    Four twin-spot flounder (Pseudorhombus diplospilus)
    
    Ocellated flounder (Pseudorhombus dupliciocellatus)
    
    Deep flounder (Pseudorhombus elevatus)
    
    Javan flounder (Pseudorhombus javanicus)
    
    Smalltooth flounder (Pseudorhombus jenynsii)
    
    Pseudorhombus levisquamis (Pseudorhombus levisquamis)
    
    Malayan flounder (Pseudorhombus malayanus)
    
    Pseudorhombus megalops (Pseudorhombus megalops)
    
    Pseudorhombus micrognathus (Pseudorhombus micrognathus)
    
    Natal flounders (Pseudorhombus natalensis)
    
    Pseudorhombus neglectus (Pseudorhombus neglectus)
    
    Pseudorhombus oculocirris (Pseudorhombus oculocirris)
    
    Roughscale flounder (Pseudorhombus oligodon)
    
    Fivespot flounder (Pseudorhombus pentophthalmus)
    
    Five-eyed flounder (Pseudorhombus quinquocellatus)
    
    Pseudorhombus russellii (Pseudorhombus russellii)
    
    Spiny flounder (Pseudorhombus spinosus)
    
    Pseudorhombus tenuirastrum (Pseudorhombus tenuirastrum)
    
    Three spotted flounders (Pseudorhombus triocellatus)
    
    Tarphops - Tarphops->
    
    Tephrinectes - Tephrinectes->
    
    Thysanopsetta - Thysanopsetta->
    
    Xystreurys - Xystreurys->
    
    Scophthalmidae - Turbots->
    
    Bothidae - Lefteye flounders->
    
    Cyclopsettidae - Cyclopsettidae->
    
    Achiridae - American soles->
    
    Achiropsettidae - Southern flounders->
    
    Citharidae - Citharids->
    
    Cynoglossidae - Tonguefishes->
    
    Oncopteridae - Remo flounders->
    
    Paralichthodidae - Peppered flounders->
    
    Poecilopsettidae - Bigeye flounders->
    
    Psettodidae - Psettodids->
    
    Rhombosoleidae - South Pacific flounders->
    
    Samaridae - Crested flounders->
  - Aulopiformes - Grinners->
  - Blenniiformes - Blennies->
  - Cyprinodontiformes - Toothcarps->
  - Osmeriformes - Smelts->
  - Centrarchiformes - Basses and sunfishes->
  - Cichliformes - Cichlids->
  - Characiformes - Characins->
  - Osteoglossiformes - Bony tongues->
  - Elopiformes - Tarpons and tenpounders->
  - Anabantiformes - Gouramies and snakeheads->
  - Gymnotiformes - South American knifefish->
  - Istiophoriformes - Barracudas->
  - Albuliformes - Bonefishes->
  - Lepidogalaxiiformes - Salamanderfishes->
  - Lophiiformes - Anglerfishes->
  - Spariformes - Breams and porgies->
  - Trachiniformes - Weeverfishes->
  - Moroniformes - Temperate basses->
  - Acanthuriformes - Surgeonfishes->
  - Zeiformes - Dories->
  - Tetraodontiformes - Puffers and filefishes->
  - Holocentriformes - Squirrelfishes->
  - Dactylopteriformes - Flying gurnards->
  - Lampriformes - Lamprids->
  - Galaxiiformes - Southern smelts->
  - Batrachoidiformes - Toadfishes->
  - Hiodontiformes - Mooneyes->
  - Percopsiformes - Trout-perches->
  - Callionymiformes - Dragonets->
  - Atheriniformes - Silversides->
  - Notacanthiformes - Spiny eels->
  - Saccopharyngiformes - Swallowers and Gulpers->
  - Alepocephaliformes - Slickheads and tubeshoulders->
  - Gonorynchiformes - Milkfishes->
  - Argentiniformes - Marine smelts->
  - Stomiiformes - Lightfishes and dragonfishes->
  - Ateleopodiformes - Jellynose fishes->
  - Myctophiformes - Lanternfishes->
  - Stylephoriformes - Tube-eyes->
  - Polymixiiformes - Beardfishes->
  - Beryciformes - Sawbellies->
  - Trachichthyiformes - Rughies->
  - Ophidiiformes - Cusk-eels->
  - Kurtiformes - Nurseryfishes & Cardinalfishes->
  - Synbranchiformes - Swamp eels->
  - Gobiesociformes - Clingfishes->
  - Acropomatiformes - Oceanic basses->
- Cladistii - Bichirs->
- Dipneusti - Lungfishes->
- Chondrostei - Sturgeons->
- Holostei - Gars and Bowfins->
Chondrichthyes - Cartilaginous fishes->
Agnatha - Jawless fishes->

Largetooth flounder (Pseudorhombus arsius)Follow

General data

Classification

Description

Catches

Taxonomy of Fishes

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Largetooth flounder (Pseudorhombus arsius)
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