Show night fliers owe much to the soup fin shark tho the soup fin shark used to be a pest a spoiler of nets the chinese used his dried fans for soup hence the name while his carcass was used for fertilizer now lie he has become the greatest source of vitamin A key to successful night flying when hitler marched into norway a large part of americas vitamin A supply of cod liver oil was cut oft off about the same time RAF naf pilots discovered that nightly doses of vitamin A reduced night blindness the demand for the vitamin had drug companies searching frantically for new sources A san francisco fish broker is credited with starting a west coast fishing boom ile he tried the worthless shark and tests showed that the liver was a hundred times richer in vitamin A than cod liver the soup fin sharks value once about 9 a ton as fertilizer soared to 1400 shark fishing for vitamins is now a thriving industry on the west coast and fishermen seek sharks from mexico to alaska |