Difference between Swim like a duck and Swim like a tailor’s goose

swim like a duck —(also: swim like a fish) be a good swimmer:

• Molly could swim like a duck, and quite covered herself with glory by diving off the pier.

swim like a tailor’s goose—be unable to swim:

• If he attempted to swim, it would be like a tailor’s goose, straight to the bottom.