The laboratory observation showed that non-reproductive females Harpiosquilla raphidea collected from the field mostly need about two weeks to develop their gonad to the stage 2. Only a few showed a gonad development from the stage 2 to stage 3 within two weeks after the date of collection from the field, which was indicated by the isosceles triangle ovarian shape on the ventral side of telson. For female Oratosquilla oratoria, such condition would be followed by spawning within a week