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Pseudorhombus arsius Largetooth Flounder, Large-tooth Flounder, Large-toothed Flounder

Pseudorhombus arsiusis commonly referred to as Largetooth Flounder, Large-tooth Flounder, Large-toothed Flounder. Difficulty in the aquarium: There are no reports available yet that this animal has already been kept in captivity successfully. Toxicity: Toxic hazard unknown.

Profilbild Urheber John Turnbull, Marine Explorer, Australien

Foto:Clifton Gardens, Sydney, New South Wales, Australien

Courtesy of the author John Turnbull, Marine Explorer, Australien Please visit for more information.

Uploaded by AndiV.

Image detail


Pseudorhombus arsius 
Largetooth Flounder, Large-tooth Flounder, Large-toothed Flounder 
Flounders & Soles 
Family tree:
Animalia (Kingdom) > Chordata (Phylum) > Actinopterygii (Class) > Pleuronectiformes (Order) > Paralichthyidae (Family) > Pseudorhombus (Genus) > arsius (Species) 
Initial determination:
(Hamilton, ), 1822 
Djibouti, Kuwait, Hong Kong, Vereinigte Arabische Emirate, Dampier Archipelago, Angola, Arabian Sea, Ashmore and Cartier Islands, Bahrain, Bangladesh, Cambodia, China, Coral sea, East Africa, Fiji, Gulf of Oman / Oman, India, Indian Ocean, Indonesia, Irak, Iran, Japan, Kenya, Lesser Sunda Islands, Madagascar, Malaysia, Micronesia, Mozambique, Myanmar, New Caledonia, New South Wales (Australia), Northern Territory (Australia), Ogasawara Islands, Pakistan, Papua New Guinea, Philippines, Quatar, Queensland (Australia), Red Sea, Saudi Arabia, Singapore, Somalia, South Australia, South-Africa, Sri Lanka, Taiwan, Tansania, Tasman Sea, Thailand, the Andaman Sea, The Ryukyu Islands, the Seychelles, Timor Sea, Vietnam, Western Australia, Western Indian Ocean 
Sea depth:
0 - 200 Meter 
11.81" - 17.72" (30cm - 45cm) 
70.52 °F - 83.3 °F (21.4°C - 28.5°C) 
Carnivore, Decapods, Fish (little fishes), Invertebrates, Predatory, Schrimps, Worms 
There are no reports available yet that this animal has already been kept in captivity successfully 
Not available as offspring 
Toxic hazard unknown 
Not evaluated 
Red List:
Not evaluated (NE) 
Related species at
Catalog of Life:
  • Pseudorhombus annulatus
  • Pseudorhombus argus
  • Pseudorhombus binii
  • Pseudorhombus cinnamoneus
  • Pseudorhombus ctenosquamis
  • Pseudorhombus diplospilus
  • Pseudorhombus elevatus
  • Pseudorhombus javanicus
Last edit:
2020-05-17 14:23:21 


Very special thanks for the first photos of Pseudorhombus arsius to John Turnbull, Marine Explorer, Australia!

This large-toothed flounder is found throughout the Indo-West Pacific region, in Australia it occurs in the coastal waters of all states except Victoria and Tasmania.

Pseudorhombus arsius occurs in shallow waters and estuaries, on muddy and sandy bottoms down to a depth of 200 meters, sometimes juvenile animals in particular occur in brackish water, in winter they migrate to deeper waters.
When these flatfish spawn, they can be found in shallow water on sandbanks and near the coast.
The spawning season lasts 3 to 4 months, from April to July, and reaches its peak in April and May, during which time the animals move to the sandy shoals near the coast.
The spawn is deposited in a single batch.
With a total length of between 16 and 17 cm, the flounders reach sexual maturity.

The flounder has an oval-shaped body, the caudal fin is separated from the dorsal and anal fins, both eyes are on the left side of the body.
The upper side is yellowish brown, mottled and spotted with darker brown, and shows a large blackish spot at the transition of the curved and straight part of the lateral line, in the middle of the straight part on the back half of the body there is one blackish spot and several indistinct dark spots above and below the lateral line;
all patches contain small scattered bright orange-yellow patches, the fins are lighter than those on the eye side of the body.

The species varies in colour and adapts exactly to the substrate on which it rests.

Pseudorhombus arsius is commercially fished in West Bengal in the mouth of the Hooghly River on a small scale, otherwise it is a flatfish that is often caught by sport fishermen and is often used for human consumption.

Attention: The large-toothed flounder has an impressive set of teeth in the front of its jaw, it has 6 to 13 large, strong teeth on the lower jaw of the blind side,
Anglers should be careful when removing the hook from the mouth of this species.



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