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Large-tooth Flounders


Large-tooth flounders, flounders, flatfishes, sanddabs, and whiffs are the common names for the members of the Paralichthyidae family. The family members have both eyes on the left side of their head and lateral line present below their lower eye. There are no spines in their pectoral and pelvic fins. Their pelvic fin bases are short and nearly symmetrical on both sides of the body.

Members of the Paralichthyidae are found in the Africa, Indian and Pacific waters. There are 14 genera and 112 species worldwide. They commonly inhabit shallow marine waters on mud and sand bottoms. Some species occur in brackish waters near river mouth but they are rarely found in freshwater. They feed mostly on small crustaceans and other bottom-living animals.



Scientific Name: Pseudorhombus arsius  (Hamilton, 1822)
English Name: Largetooth Flounder
Chinese Name | 鱼类中文名: 大牙斑鮃 (Dàyá bān píng), 大齿斑鲆 (Dà chǐ bān píng), 比目鱼 (Bǐmùyú), 偏口鱼 (Piān kǒu yú), 左口鱼 (Zuǒ kǒu yú)
Malay Name | Nama Bahasa Melayu Malaysia: Ikan Sebelah, Sisa Nabi, Sebelah Gigi Besar
Thai Name | ชื่อสามัญภาษาไทย: ปลาลิ้นควายเกล็ดลื่น (Plā lînkhwāy kel̆d lụ̄̀n), ปลาลิ้นเสือ (Plā lîns̄eụ̄x)
Main Identification Features: A dark blotch at junction of straight and curved parts of lateral line, and another blotch half-way to caudal-fin base. Dorsal fin with 71 to 84 soft rays, anal fin with 53 to 62 soft rays, pectoral fin on eyed side with 12 or 13 rays. Large canines teeth in front part of both jaws. Maxilla extending to below posterior margin of lower eye.
Size: Maximum standard length 45 cm, commonly to 30 cm.
Habitat and Ecology: Coastal and estuaries soft bottoms, to 200 m depth. Feeds mainly on bottom-living animals.

Ikan Sebelah Gigi Besar

Largetooth Flounder blind side




Scientific Name: Pseudorhombus elevatus  Ogilby, 1912
English Name: Deep Flounder, Ringed Flounder, Deep-bodied Flounder, Flatfish
Chinese Name | 鱼类中文名: 高体斑鲆 (Gāo tǐ bān píng), 比目鱼 (Bǐmùyú), 扁鱼 (Biǎn yú), 偏口鱼 (Piān kǒu yú), 左口鱼 (Zuǒ kǒu yú)
Malay Name | Nama Bahasa Melayu Malaysia: Ikan Sebelah, Sisa Nabi, Sebelah Bulat
Main Identification Features: Upper profile of head with a distinct notch in front of upper eye. Maxilla not reaching past middle of lower eye. Teeth in both jaws all small, not enlarged anteriorly. 2 dark blotches, one at junction of straight and curved parts of lateral line and on the lateral line at posterior part of body. Additional dark blotch is present at front of caudal peduncle. Eyed side with very mild dark rings arranged in about 5 longitudinal rows. Small dark spots and elongated markings on dorsal, anal and caudal fins.
Size: Maximum standard length 20.0, commonly to 15.0 cm.
Habitat and Ecology: Found on clay, sand and mud bottoms of the continental shelf, to 200 m depth. Feeds on benthic animals.

Ikan Sebelah Bulat

Deep Flounder head

Deep Flounder blind side