Melamphaes macrocephalus Parr, 1931
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 Family:  Melamphaidae (Bigscale fishes or ridgeheads)
 Max. size:  12.8 cm SL (male/unsexed)
 Environment:  bathypelagic; depth range 62 - 500 m
 Distribution:  Eastern Pacific Ocean: tropical, endemic to ETP, from the California coast (ca. 30°N) down to northern Chilean coast (ca. 23°S).
 Diagnosis:  Dorsal spines (total): 3-3; Dorsal soft rays (total): 13-16; Anal spines: 1-1; Anal soft rays: 8-8; Vertebrae: 27-28. The species is characterized by the following: large head (more than 40% of SL, specimens of SL ? 100.0 mm); first gill arch with 20-22 rakers; total vertebrae 26-28, 11 abdominal; haemal arch of the first caudal vertebra is without a spur; D III,13-16; P14-15; ventral fin with 7 soft rays; ventral fin starts before the vertical line of the posterior margin of the pectoral fin basement; anal fin starts under the vertical line of the 3-4 ray of the dorsal fin (posterior end); operculum with 4 scales (Ref. 87970).
 Biology:  Adults caught below 400-500 meters; juveniles in shallower water (Ref. 51657). Specimens were sampled by open-mouth nets at depth range of 1500-0 m; the minimal sampling depth was 62 m (individuals with SL = 12.7-13.3 mm) (Ref. 87970).
 IUCN Red List Status: Not Evaluated  (Ref. 96402)
 Threat to humans:  harmless
 Country info:   

 Entered by: Garilao, Cristina V. - 09.02.00
 Modified by: Capuli, Estelita Emily - 09.11.11

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