The main ecological issue is overfishing. Aquatic ecosystems are affected by overfishing because if there are losses in fish then other ocean creatures will slowly die of. Japan, China, the U.S., Indonesia, Chinese Taipei, and South Korea are the main issue of overfishing, and the long-term effect of overfishing is loss of fish, which would mean loss of other ocean animals such as, such as, killer whales, sharks, sea lions, and any other ocean carnivore. Coral reefs are affected…