Idiacanthus fasciola Peters, 1877
Ribbon sawtail fish
photo by Tibbatts, B.

Family:  Stomiidae (Barbeled dragonfishes), subfamily: Idiacanthinae
Max. size:  48.9 cm SL (male/unsexed); 29 cm SL (female)
Environment:  bathypelagic; marine; depth range 0 - 2000 m
Distribution:  North Atlantic: north of 10°N. South Atlantic: southern tip of Africa. Also recorded from the Patagonian region of Argentina (Ref. 27363). Indo-Pacific: across the Indian Ocean north of about 23°S to west and central Pacific between 27°N and 23°S. South China Sea and water near Taiwan (Ref.74511).
Diagnosis:  Dorsal spines (total): 0-0; Dorsal soft rays (total): 62-72; Anal spines: 0-0; Anal soft rays: 39-46. Pelvic fins of females with 6 soft rays, absent in males (Ref. 6600). No true gill rakers (Ref. 27363). Dark brown or pale in male and black or dark brownish black in female (Ref. 37473).
Biology:  Mesopelagic in depths exceeding 500 m (Ref. 7249) and bathypelagic (Ref. 58302). Females undergo diel vertical migrations (Ref. 7249).
IUCN Red List Status: Least Concern (LC); Date assessed: 19 May 2013 Ref. (130435)
Threat to humans:  harmless


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