Hairtails (Cutlassfishes)
Hairtails, also known as cutlassfishes, scabbardfishes and frostfishes, are long, ribbon-shaped predatory marine fishes belonging to the family Trichiuridae. They are recognized by their long, extremely compressed silvery bodies, sharp fang-like teeth, and dorsal fins that extend almost the entire length of the body. Their caudal fin tapers to a point or is very small and forked.
They are found in tropical and warm-temperate waters of the Atlantic, Indian and Pacific oceans. Most inhabit coastal and offshore waters from the surface to depths of about 2,000 m, where they prey on fishes, squids and crustaceans.
There are 10 genera and about 46 species worldwide.
They are found in tropical and warm-temperate waters of the Atlantic, Indian and Pacific oceans. Most inhabit coastal and offshore waters from the surface to depths of about 2,000 m, where they prey on fishes, squids and crustaceans.
There are 10 genera and about 46 species worldwide.
Scientific Name: Assurger anzac (Alexander, 1917)
English Name: Razorback Scabbardfish
French Name: Poisson-sabre rasoir
Chinese Name | 鱼类中文名: 长剃刀带鱼 (Zhǎng tìdāo dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Selayur, Timah-layur
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงิน (Plā dābngein)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed. Caudal fin present, small and forked. Head profile with a prominent sagittal crest. No notch between spinous and soft part of dorsal fin.
Size: Maximum standard length 225 cm.
Habitat and Ecology: Adult presumed to be benthopelagic, at 150 to 400 m depth while juveniles are found near the surface or in midwater. Feeds on fishes and squids.
Scientific Name: Lepturacanthus savala (Cuvier, 1829)
English Name: Savalani Hairtail
Chinese Name | 鱼类中文名: 白带鱼 (Bái dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Selayur, Timah Pucuk
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงิน (Plā dābngein)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed. Caudal tapering part very long. Snout long, its length 2 to 2.5 times in head length. 2 small forward directed canine teeth present in upper jaw. Lower hind margin of gill cover concave. Tip of both jaws black.
Size: Maximum standard length 100 cm, commonly to 70 cm.
Habitat and Ecology: Benthopelagic, to about 100 m depth. Often comes close to the surface at night. A highly carnivore fish, feeding mainly on fish, crustaceans and cephalopods. A preference for fishes of the genera Stolephorus, Sardinella and Dussumieria, prawns of the genera, Penaeus and Metapenaeus and shrimps of the genus Acetes. Cannibalism of juveniles had also been recorded.
Scientific Name: Trichiurus lepturus Linnaeus, 1758
English Name: Large-head hairtail
Chinese Name | 鱼类中文名: 白带鱼 (Bái dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Timah Selayur
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงินใหญ่ (Plā dābngein yai)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed, tapering into a hair-like process. Free margin of subopercle concave. Dorsal fin relatively high. Fangs on jaws with barbs.
Size: Maximum total length 234 cm, commonly between 50 and 100 cm.
Habitat and Ecology: Benthopelagic, from shallow inshore waters to 350 m depth, usually in dense schools. Juveniles feed mostly on euphausiids, small pelagic planktonic crustaceans and small fishes. Adults become more piscivorous and feed on larger pelagic fishes, and occasionally on squids and crustaceans. Large adults usually feed near the surface during daytime and migrate to bottom at night. Juveniles and small adults form schools in midwater during the daytime and disperse into loose feeding aggregations at night near the surface.
English Name: Razorback Scabbardfish
French Name: Poisson-sabre rasoir
Chinese Name | 鱼类中文名: 长剃刀带鱼 (Zhǎng tìdāo dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Selayur, Timah-layur
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงิน (Plā dābngein)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed. Caudal fin present, small and forked. Head profile with a prominent sagittal crest. No notch between spinous and soft part of dorsal fin.
Size: Maximum standard length 225 cm.
Habitat and Ecology: Adult presumed to be benthopelagic, at 150 to 400 m depth while juveniles are found near the surface or in midwater. Feeds on fishes and squids.
Scientific Name: Lepturacanthus savala (Cuvier, 1829)
English Name: Savalani Hairtail
Chinese Name | 鱼类中文名: 白带鱼 (Bái dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Selayur, Timah Pucuk
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงิน (Plā dābngein)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed. Caudal tapering part very long. Snout long, its length 2 to 2.5 times in head length. 2 small forward directed canine teeth present in upper jaw. Lower hind margin of gill cover concave. Tip of both jaws black.
Size: Maximum standard length 100 cm, commonly to 70 cm.
Habitat and Ecology: Benthopelagic, to about 100 m depth. Often comes close to the surface at night. A highly carnivore fish, feeding mainly on fish, crustaceans and cephalopods. A preference for fishes of the genera Stolephorus, Sardinella and Dussumieria, prawns of the genera, Penaeus and Metapenaeus and shrimps of the genus Acetes. Cannibalism of juveniles had also been recorded.
Scientific Name: Trichiurus lepturus Linnaeus, 1758
English Name: Large-head hairtail
Chinese Name | 鱼类中文名: 白带鱼 (Bái dàiyú)
Malay Name | Nama Melayu Malaysia: Ikan Timah, Layur, Loroi, Langeng, Timah Selayur
Thai Name | ชื่อสามัญภาษาไทย: ปลาดาบเงินใหญ่ (Plā dābngein yai)
Local Hokkien: Pek Tua
Main Identification Features: Body extremely elongate and strongly compressed, tapering into a hair-like process. Free margin of subopercle concave. Dorsal fin relatively high. Fangs on jaws with barbs.
Size: Maximum total length 234 cm, commonly between 50 and 100 cm.
Habitat and Ecology: Benthopelagic, from shallow inshore waters to 350 m depth, usually in dense schools. Juveniles feed mostly on euphausiids, small pelagic planktonic crustaceans and small fishes. Adults become more piscivorous and feed on larger pelagic fishes, and occasionally on squids and crustaceans. Large adults usually feed near the surface during daytime and migrate to bottom at night. Juveniles and small adults form schools in midwater during the daytime and disperse into loose feeding aggregations at night near the surface.
