Answer:
Hold the tail, while I fish for you.
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
I bubble and laugh and spit water in your face. I am no lady, and I don't wear lace.
Man walks over, and man swims under. In times of war, it can be burned asunder. What is it?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
I have two eyes in the front and a lot of eyes on my tail