Cooling off in the turquoise waters of a tropical resort feels rather less appealing this Christmas in the wake of two fatal shark attacks in as many weeks. Newlywed Lauren Erickson Van Wart, 44, from Massachusetts, was killed while paddleboarding with her husband off the coast of Nassau on Monday, while in Mexico, a 26-year-old mother lost her life to a bull shark while swimming with her daughter, five, off Melaque Bay, Cihuatlán.