---
title: Largetooth Flounder (Pseudorhombus arsius)
scientific_name: Pseudorhombus arsius
common_name: Largetooth Flounder
taxon: Lefteye flounders
conservation_status: LC - Least Concern
published: 2026-08-03T15:29:55.368Z
updated: 2026-08-08T21:48:00.933Z
tags: Largetooth Flounder, Pseudorhombus arsius, Lefteye flounders, Red Sea, Marine Life, Diving
url: https://redseacreatures.com/taxon/fishes/bony-fishes/lefteye-flounders/largetooth-flounder
---

# Largetooth Flounder (*Pseudorhombus arsius*)

## Quick facts

- **Group:** Lefteye flounders
- **Size:** up to 40 cm
- **Weight:** 800 g
- **Depth:** 0-200 m
- **Diet:** Carnivore
- **Rarity:** Common
- **Habitat:** Shallow sand in bays and lagoons
- **Conservation status:** LC - Least Concern

## How to recognise it

- large mouth with visible canine teeth
- mottled brown with darker blotches along the lateral line
- both eyes on the left side

A flounder of up to 40 cm with both eyes on the left side and a mouth that is large for a flatfish, armed with the canine teeth that give it its name. The eyed side is mottled brown, usually with a pair of darker blotches along the lateral line, and matches the sand it lies on closely enough that the fish is normally seen only when it moves. It prefers sheltered water - protected bays and lagoons with a shallow sand bottom - rather than the open reef, and takes small fish and crustaceans in a short rush from a standing start. Ranges from the Red Sea east to Fiji and Japan.

## Also known as

- **English:** largetooth flounder, Large-tooth Flounder, Large-toothed Flounder
- **Arabic:** مفلطح كبير الأسنان
- **French:** Rite dentu
- **Spanish:** Lenguado Dentudo
- **Japanese:** テンジクガレイ, Tenjiku-garei, Tenjikugarei
- **Chinese:** 大牙斑鮃, 大牙斑鲆
- **Russian:** Крупнозубая камбала
- **BEN:** বারা দৈত্য ছেরবাতি
- **MSA:** Sisa Nabi
- **SOM:** Sheer-sheerto
- **SW:** Wayo
- **TAM:** நாக்கு மீன்
- **TH:** ปลาลิ้นควายเขี้ยวใหญ่

## Scientific synonyms

- *Neorhombus occellatus* De Vis, 1886
- *Neorhombus ocellatus* De Vis, 1886
- *Pleuronectes arsius* Hamilton, 1822
- *Pleuronectes mortoniensis* De Vis, 1882
- *Pseudorhombus andersoni* Gilchrist, 1904
- *Pseudorhombus arius* (Hamilton, 1822)
- *Pseudorhombus polyspilos* (Bleeker, 1853)
- *Pseudorhombus polyspilus* (Bleeker, 1853)
- *Rhombus lentiginosus* Richardson, 1843
- *Rhombus polyspilos* Bleeker, 1853
- *Teratorhombus excisiceps* Macleay, 1881

## Range

Djibouti, Federal Republic of Somalia, Kenya, Madagascar, Mozambique, Seychelles, South Africa, Tanzania

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*Source: [Red Sea Creatures](https://redseacreatures.com/taxon/fishes/bony-fishes/lefteye-flounders/largetooth-flounder)*
*Updated: August 8, 2026*