By Joe Smith A school student has landed a fish weighing more than a fully grown man after the fishing trip of a lifetime to a beach in Florida. The fish, estimated to weigh about 250 pounds or 18 stone, was caught by 17-year-old high school student Isaac Francis who hauled the monster ashore at Turtle Beach in Sarasota. Isaac’s father described how the fishing line belonging to his son, who is a junior at Riverview High School, went tight, starting an epic battle to land the nearly 250-pound goliath grouper. READ MORE: Astonishing time it would take fearsome piranha fish to eat a whole dog Da…