Have you ever wondered why fish school and quickly shift all together in another direction? The last week of February 2012 found me experiencing this year’s Leap Day in the Florida Keys. Yes, it was splendid. Our base was a rented home in Marathon. For four days we rented a Boston Whaler-looking boat and proceeded nine miles into the Gulf of Mexico and anchored around a sunken boat where fish were known to school. To lure the fish, my husband Rick put out what is called “chum.” We waited and soon little fish called pinfish came for the chum. They…