Physical Characteristics

Body long, compressed, tapering to a fine point and tiny caudal fin. Anus separated from urogenital opening, the former situated between the pelvic fin bases, the latter just ahead of the anal fin. A light organ present on the ventral part of body and sides of head, appearing as purplish, striated area. First dorsal fin has one spine and 7-9 rays; second dorsal and anal fins each has more than 123 rays. Anterior portion of anal fin elevated, containing 10-12 rays. Pectoral fin has 14-17 rays. First ray of pelvic fin filamentous. Body silvery, upper part somewhat brownish, belly purplish.

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