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Alvarino, 1967

Description
Hooks: 6; anterior teeth: 10; posterior teeth: 19.
Maximum adult body length: 15 mm; tail: 19-22 %.
Body slender, transparent; transversal musculature absent; head medium width; hooks not serrated. Fin bridge absent. Anterior fins of medium length, fully rayed, rounded; posterior fins of medium length, fully rayed, angular. Collarette absent; gut diverticula absent. Small eyes with T-shaped pigment spot. Seminal vesicles with knob and trunk; position of seminal vesicles: touching both posterior fins and tail fin. Ovaries medium length, to region of ventral ganglion; ova large. Adhesive papillae and adhesive organs absent. Apical glands absent.

Distribution: epipelagic; Gulf of Thailand.

Remarks:

Type locality: 09°17'N, 100°06'E.

Sagitta bruuni