If he goes to the bathroom, does he stay in the water, or does he come out? If he lives in the water and poops in the water...eeewww. If he comes out of the water, and has a really hard movement, can he dry out and die?

The gillman swims in a tank of Yak semen for nourishment and pleasure... from what I understand, he can function outside of the semen as long as he gets his cum fix somewhere during the day.

that was what I was looking for