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Tokioka, 1940

Hooks: 5-8; anterior teeth: 7-13; posterior teeth: 16-24.
Maximum adult body length: 14 mm; tail: 22-28 %.
Body slender; transversal musculature absent; head narrow; hooks serrated, both in juveniles and in adults. Fin bridge absent. Anterior fins of medium length, fully rayed, rounded; posterior fins of medium length, partially rayed, angular. Collarette absent; gut diverticula absent. Large eyes, with T-shaped pigment spot. Seminal vesicles with knob and trunk; position of seminal vesicles: touching, or close to, posterior fins and well separated from tail fin. Ovaries of medium length, reaching to region of ventral ganglion; ova large. Adhesive papillae and adhesive organs absent. Apical glands absent.

Distribution: epipelagic; Indo-Pacific, between 40°N and 40°S.

Remarks: seminal vesicles have numerous teeth-like appendages on the knob.

Type locality:

Sagitta pacifica