In sponges, asexual reproduction can be done in two ways:
1. By budding (birth of buds, asexual reproduction of some invertebrates)
2. By the internal production of gemmules, which after the death of the sponge can also play the role of propagules. This stage of life allows the species to survive difficult conditions (dehydration, cold, lack of food) and sometimes to move better in space.
