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Doncaster, 1902

Description
Hooks: 7-8; anterior teeth: 6-9; posterior teeth: 10-15.
Maximum adult body length: 12 mm; tail: 27-28 %.
Body firm, opaque; transversal musculature absent; head wide; hooks not serrated. Fin bridge absent. Anterior fins of medium length, fully rayed, rounded; posterior fins of medium length, fully rayed, angular. Collarette long; gut diverticula present. 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 long, reaching neck region; ova small. Adhesive papillae and adhesive organs absent. Apical glands absent.

Distribution: epipelagic; Indo-Pacific, between 30°N and 30°S.

Remarks:

Type locality:

Sagitta robusta