Scientific Name
Chiasmodon niger  
Chiasmodon niger黑叉齒魚
by: Lab of Fish Ecol. and Evo., BRCAS
Author Johnson, 1864 Depth 750 - 1500M
Chinese 黑叉齒魚 Poisonous Fish No 
Family_Chinese 叉齒魚科 Economic Fish No 
Family F432 Chiasmodontidae Edible Fish No  Chinese In Mainland China 黑叉齒龍鰧 
Max Length 25 cm  Aquarium Fish No  Common Name 黑狗母 
Distribution in World global   Distribution in Taiwan South、North East 
Habitats Ocean、Deep Sea  Holotype Locality off madeira 
Synonyms Chiasmodon bolangeri, Chiasmodus niger, Ponerodon vastator   
Reference 臺灣魚類誌(沈等, 1993);Fishbase(2006);Fishes of Japan(Nakabo, 2002);The Live Marine Resources of the Western Central Pacific, Vol.6(FAO, 2001)  Johnson, J. Y. 1864 沈世傑 編 Shih-Chieh Shen ed. 1993 Nakabo T. 2002 Nakabo T. 2002 
Specimen List ASIZP0063821. ASIZP0065445. ASIZP0900535. SU23553.  
Common Name Black swallower 
Redlist Status NL Not in IUCN Redlist     
Characteristic Body elongate. Head with elongate or rounded snout, longer than eye. Mouth large, premaxilla and maxilla non-protractile, slender, firmly connected distally, and extending well beyond posterior margin of eye. Both jaws with large and long cannine-like teeth, one or all of first 3 teeth longer than all teeth behind 3rd on both jaws. Two separate dorsal fins, first short with XI spines, second long with 29 soft rays; anal fin long with I spine and 26 to 28 soft rays. Body naked without spinoid scales. Photophores absent. Lateral line a series of obvious pores midlaterally along length of body. Body uniformly dark brown or black.
habitats Mesopelagic to bathypelagic species. Feeds on whole fish, often of individuals longer than themselves. Most specimens were taken at depths greater than 750 m. 
Distribution Widespread in the tropical and temperate waters. It is found in southwestern Taiwanese waters. 
Utility No commercial value.