progeny asexually; such progeny include both sexual and asexual zooids in three sequential "generations".

The nurse produces buds (which grow into new zooids) in its ventral stalk, but the buds grow and mature on its dorsal stalk. Each bud is an aggregate of a few dozen cells, and the way it gets to its final place is the first peculiarity of doliolid reproduction. Buds are immobile, but are actively carried by special mobile cells, called phorocytes, which literally means "carrier cells",