When they begin breeding, amid aquatic plants such as duckweed one can see the male fish bobbing up and down under the surface of the water, repeatedly swallowing air and blowing out bubbles of air and mucus. Many of the bubbles float up to the surface and burst, so the fathers-to-be have to work continuously for hours at a stretch to build thick nests of bubbles for their future eggs to hatch.
牠們反覆吞進空氣、吹氣和吐黏液製造泡泡，由於泡泡接觸空氣容易破滅，準爸爸必須花好幾個鐘頭持續不斷工作，才能完成一團團層層疊疊、非常厚實的泡巢，也就是未來魚卵的孵化場。