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Casanova, 1985

Hooks: 8-9; anterior teeth: 12-14; posterior teeth: 13-15.
Maximum adult body length: 32 mm; tail: 18-19 %.
Body slender, flaccid; transversal musculature absent; head medium narrow; hooks not serrated. Fin bridge absent. Anterior fins very short, partially rayed, rounded; posterior fins short, partially rayed, angular. Collarette absent or small; gut diverticula absent. Small eyes with round pigment spot. Seminal vesicles conical; position of seminal vesicles: touching tail fin, separated from posterior fins. Ovaries short, to anterior end of posterior fins; ova small. Adhesive papillae and adhesive organs absent; apical glands absent.

Distribution: shallow mesopelagic; Gulf of Aden.

Remarks: 2 specimens found at 400 m.

Type locality: 11°52.1'N, 43°15.5'E, Gulf of Aden.

Sagitta adenensis