At a spot where the water begins to flow more rapidly, Wang's net scoops up nymphs of another damselfly, Psolodesmus mandarinus. Along their bodies are three prominent egg-shaped organs-rectal gills, with which damselflies breathe.
在水流稍急的進水處，汪良仲則撈出屬於豆娘的「中華珈蟌」幼蟲，身上三片醒目的卵型器官，是豆娘專門用來呼吸的尾鰓。