over fishing is a big problem in the world. Over fishing is basically the decrease of fish stocks because of various reasons.
billions of people rely on sea life as a source of protein. Scientists believe that if the world doesn't change then in a few decades most of the sea life will be extinct.
Corol reaves aged thousands of years old and other irreplaceable ocean habitats that sea life depend on are being dragged, bulldozed and destroyed from multi ton bottom troller in a desperate search for more fish. To support the cause you could join or support organisations that ban over fishing.