The Red Wiggler is also known as Eisenia foetida. Unlike most worms a red wiggler cannot produce offspring alone. They must reproduce by mating. Two worms come together at the clitellum. While joined they exchange seminal fluid. A ring is then formed around the worms. As the worms back out of the ring, seminal fluid is released into the ring. The ring then closes and forms a cocoon. Each cocoon averages about three hatchlings.
This picture shows the mating and eventually the hatching of red wigglers.