Hooks: 10-11; anterior teeth: 4; posterior teeth: 6.
Maximum adult body length: 6 mm; tail: 33 %.
Body firm, opaque; transversal musculature absent; head narrow; hooks not serrated. Fin bridge absent. Anterior fins of medium length, fully rayed, rounded; posterior fins medium length, fully rayed, rounded. Collarette long and very conspicuous; gut diverticula present. Small eyes with T-shaped pigment spot. Seminal vesicles with knob and trunk; position of seminal vesicles: touching posterior fins and 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 30°N and 30°S.