Answer:
When they are caught, they are thrown away. When they escape, you itch all day.
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I wear a red robe, with staff in hand, and a stone in my throat.
A precious stone, as clear as diamond. Seek it out whilst the sun's near the horizon. Though you can walk on water with its power, Try to keep it, and it'll vanish within an hour.
I bubble and laugh and spit water in your face. I am no lady, and I don't wear lace.
It rows quickly with four oars but never comes out from under his own roof. What is it?