Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
What is that over the head and under the hat?
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
What stays the same size no matter how much they weight?
What is weightless but takes two people to hold it?
you hold my tail while I fish for you