Why does the male bilharzia parasite hold the female worm?

The male bilharzia parasite, or Schistosoma, holds the female worm within a structure called the gynecophoral canal. This adaptation allows the male to provide a stable environment for the female, facilitating reproduction. By remaining close, the male ensures that the female can produce eggs efficiently, which is crucial for the parasite's lifecycle and successful transmission to new hosts. This pairing enhances the likelihood of survival and propagation of the species.