Gently hold the male on his back with one hand to expose his underside, and with the other hand, simultaneously squeeze his body in a direction from behind the operculum to the gonopodial area.

• 轻轻的用一只手抓住公鱼并且让它肚皮朝上，同时用另一只手顺着一个方向从鱼鳃后部到肛门处挤压。