However, instead of using a mucus-like substance hung on plants above water, betta fish will blow bubble nests that gather on the surface of the water. Other types of fish nests include mound ...

Before mating, the male spends hours blowing bubbles at the water’s surface to build what’s called a mucus bubble nest. He then puts on a display to attract a female, becoming brighter and ...

The group spends hours pumping out gametes and bubble-wrapping them in foam that will shield growing embryos. Five days later tadpoles will wiggle free of the nest and plop into the water below.