[adamanteus]

I always try to include a water bowl large enough for my snakes to swim in, whenever it's practical.

I don't know if it's because my water bowls are sunken into the the floor, and provided with surrounding cover, but I find my snakes will often lay, half concealed, with their heads motionless over the water, as if waiting to see movement from passing fish. I'll try to get a photo later.