Fishing
Cast, hook it when it bites, then reel. Fish in the fountain, the pond, the sea or the wild ponds.
Walk up to water (the fountain, the pond, a cloud pool, the sea or a pond in the wilds) and press E. Cast, press Hook! when it bites, then hold to reel and let go when told.
A better rod gives you longer to hook, less pull, more whoppers and more rare fish. There's a fishing contest at the pond every morning at 8, and a Fishing Tourney on the second Saturday of the month.