How do statoblasts help freshwater bryozoans spread?

Statoblasts are specialized, dormant buds produced by freshwater bryozoans that serve as a vital mechanism for both survival and dispersal. These structures are encased in a hard, chitinous shell that protects the organism during periods of environmental stress, such as drought or the cold of autumn and winter.123

By remaining dormant within this resistant covering, statoblasts allow the species to persist when the adult colony dies. When favorable environmental conditions return, the statoblasts develop into new bryozoan colonies. While the primary function of the statoblast is to ensure the survival of the species through adverse conditions, such dormant stages in invertebrates are often dispersed by external factors—such as water currents, wind, or transport by other animals—enabling the bryozoans to spread to new habitats. Ultimately, this form of asexual reproduction acts as a means of perpetuating and spreading a successful genotype.231