Bill is a minor character in Finding Nemo.
Bill is a longnose butterfly fish and father to Tad. He hangs out with Bob and Ted as they each drop their kids off to school in Mr. Ray's class. He, Bob and Ted ask Marlin to tell them a joke since he's a clownfish, to which Marlin tries, but has difficulty telling it. However, when Marlin returns from his journey, he manages to tell a good one that has all three rolling over with laughter. Besides Tad, Bill has another child as he mentions when the kids leave with Mr. Ray to go to the drop off.