Scientific Name	Poromitra crassiceps   Pronounce			by: Lab of Fish Ecol. and Evo., BRCAS
Author	(Günther, 1878)	Depth	600 - 3300M
Chinese	厚頭犀孔鯛	Poisonous Fish	No
Family_Chinese	孔頭鯛科	Economic Fish	No
Family	F267　Melamphaidae	Edible Fish	No	Chinese In Mainland China	厚頭犀孔鯛
Max Length	18 cm	Aquarium Fish	No	Common Name	孔頭鯛
Distribution in World	global	Distribution in Taiwan	North East
Habitats	Deep Sea	Holotype Locality	Mid-Atlantic, Challenger station 107; off Pernambuco, Brazil, Challenger station 107 or 120; and Antarctic Ocean, depth 675-1500 fathoms
Synonyms	Melamphaes crassiceps, Melamphaes unicornis, Scopelus crassiceps
Reference	The Live Marine Resources of the Western Central Pacific, Vol.4(FAO,1999)；Fishes of Japan(Nakabo, 2002)；東海深海魚類(朱等，1986)  Günther, A. 1878 Carpenter, K. E. etc. 1999 Nakabo T. 2002 Nakabo T. 2002
Specimen List	ASIZP0059787. ASIZP0059954. ASIZP0063272. ASIZP0066297. ASIZP0070635. ASIZP0801508. ASIZP0911508. FRIP03009. NMNSF00548.
Barcode	2008-03-24,Kui-Ching Hsu,CO1,100%
Common Name	Crested bigscale; Crested melamphid; Ridgehead
Redlist Status	Not in IUCN Redlist
Characteristic	Body elongate, subcylindrical. Head large; Crest-likeridges of head with serrate margins; internarial spine present. Eyes moderately large, shorter than snout length; eye diameter more than 1/2 suborbital width. Snout short and steep. Jaws long, extending to posterior margin of eye. Teeth minute, uniserial row in upper jaw; palate toothless. Posterior margin of preopercle serrated. One dorsal fin with III weak spines and 12 to 14 soft rays; anal fin with I weak spine and 9 or 10 soft rays; caudal fin with 3 or 4 procurrent spines preceding upper and lower lobes; pelvic fins thoracic, with I spine and 7 soft rays; pectoral fins with 13 to 14 rays. Scales thin and cycloid, usually deciduous, moderate-sized to very large, 28 to 31 in longitudinal series. No photophores or light organs. Body and head dark brown or black.
habitats	Found below 750 m during the day, shallower at night. Adults feed on small crustaceans. There is significant morphological variation between populations. Oviparous, with planktonic eggs and larvae.
Distribution	Worldwide except Arctic and Mediterranean seas. It is mainly found in northeastern Taiwanese waters.
Utility	No commercial value.