Members of the Nemipteridae family are found mainly in tropical and subtropical waters of the Indo-West Pacific. They are distinguished by having a single continuous dorsal fin, with 10 spines and 9 soft rays, and anal fin with 3 spines and 7 to 8 soft rays. Their colour are extremely variable, but often pinkish or reddish with red, yellow or blue markings.
Nemipterids are carnivorous bottom-living fishes feeding mainly on other small fishes, cephalopods, crustaceans, and polychaetes. They can be solitary or schooling and do not appear to be territorial.Worldwide, there are 5 genera and about 66 species. The 5 genera are Nemipterus (Threadfin Breams), Parascolopsis (Dwarf Monocle Breams), Pentapodus (Whiptails), Scaevius (Coral Breams) and Scolopsis (Monocle Breams).
Threadfin Breams or Nemipterus are distinguished by not having suborbital spine and 3 transverse scale rows on preopercle. There are approximately 19 species of Threadfin Breams found in Malaysian waters.
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Scientific Name: Nemipterus furcosus (Valenciennes, 1830) English Name: Fork-tailed Threadfin Bream, Rosy Threadfin Bream Mandarin Name | 鱼类中文名: 红哥里 (Hóng gē lǐ), 红金线鱼 (Hóng jīn xiàn yú) Local Malay Name: Ikan Kerisi, Kerisi Merah Ros Thai Name | ชื่อสามัญภาษาไทย: ปลาทรายแดงหางส้อม (Plā thrāy dæng h̄āng s̄̂xm) Local Hokkien: Ang Goh Li Local Teochew: Ang Nee Main Identification Features: Nine indistinct cross bar present on dorsal of body. White strip present on lower lobe of caudal fin. Size: Maximum standard length 22.5 cm, commonly to 18 cm.   Scientific Name: Nemipterus hexodon (Quoy & Gaimard, 1824) English Name: Ornate Threadfin Bream, Yellow-banded Butterfly Bream Mandarin Name | 鱼类中文名: 红哥里 (Hóng gē lǐ), 虹色金线鱼 (Hóng sè jīn xiàn yú) Local Malay Name: Ikan Kerisi, Gurisi Merah, Gresik (Indonesia), Kambayan (Indonesia), Pasir-pasir, Kerisi Pelangi Thai Name | ชื่อสามัญภาษาไทย: ปลาทรายแดงโม่ง (Plā thrāy dæng mòng) Local Hokkien: Ang Goh Li Local Teochew: Ang Nee Main Identification Features: Pectoral fins long, reaching to or beyond level of anus. Pelvic fins very long, reaching to or just beyond level of anus. Caudal fin forked, upper lobe slightly longer than lower, tipped with yellow. 6 to 8 pale yellow stripes on sides from below lateral line. Blood red, ovoid spot below origin of lateral line, bordered below by bright yellow. Dorsal fin translucent whitish, with a yellow margin and a narrow yellow stripe (bordered by narrow pale bluish-white stripe). Golden reflections behind eye, on cheeks and opercle. Size: Maximum standard length 21 cm, commonly to 15 cm.   Scientific Name: Nemipterus japonicus (Bloch, 1791) English Name: Japanese Threadfin Bream Mandarin Name | 鱼类中文名: 红哥里 (Hóng gē lǐ), 日本金线鱼 (Rìběn jīn xiàn yú) Local Malay Name: Ikan Kerisi, Kerisi Jepun Thai Name | ชื่อสามัญภาษาไทย: ปลาทรายแดงญี่ปุ่น (Plā thrāy dæng ỵī̀pùn) Local Hokkien: Ang Goh Li Local Teochew: Ang Nee Main Identification Features: Upper lobe of caudal fin slightly longer than lower lobe and produced into a short or moderately long yellow filament. A prominent red-suffused yellow blotch below origin of lateral line. Eleven or twelve pale golden yellow stripes along body from behind head to base of caudal fin. Size: Maximum standard length 25 cm, commonly to 15 cm.   Scientific Name: Nemipterus peronii (Valenciennes, 1830) English Name: Notchedfin Threadfin Bream French Name: Cohana tolu Spanish Name: Baga tolú Mandarin Name | 鱼类中文名: 红哥里 (Hóng gē lǐ), 菲氏金线鱼 (Fēi shì jīn xiàn yú) Local Malay Name: Ikan Kerisi, Kerisi Merah Thai Name | ชื่อสามัญภาษาไทย: ปลาทรายแดงกระโดงเว้า (Plā thrāy dæng kradong wêā) Local Hokkien: Ang Goh Li Local Teochew: Ang Nee Main Identification Features: Elongated dorsal fin spines with deeply incised interspinous membrane. A diffuse pale reddish spot below and just behind origin of lateral line and a golden yellow stripe on snout in front of eye passing through nostrils. Size: Maximum standard length 26.5 cm, commonly to 17 cm.   Scientific Name: Nemipterus virgatus (Houttuyn, 1782) English Name: Golden Threadfin Bream Mandarin Name | 鱼类中文名: 红哥里 (Hóng gē lǐ), 金线鱼 (Jīn xiàn yú) Local Malay Name: Ikan Kerisi, Kerisi Emas Local Hokkien: Ang Goh Li Local Teochew: Ang Nee Main Identification Features: A Yellow stripe on back above lateral line and 5 yellow stripes on sides beneath lateral line. A yellow stripe from upper lip extending to underside margin of eye. Upper lobe of caudal fin with a trailing filament. Size: Maximum standard length 35 cm, commonly to 23 cm. 
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