EASY 10 points! rephrase this?

Around the world, fishing industries are gradually losing money each year. Much of this is due to poor management of fishing businesses and fish populations are continuously growing smaller. In 2008, the United Nations, World Bank and United Nations Food and Agriculture Organization (FAO) reported that approximately fifty billion dollars USD are being lost each year, erting that half the world's fishing fleet could be scrapped with no change in catch. Fish populations have been depleted so much that it is no longer possible to catch the same amount of fish as in previous years, also negatively affecting many groups of people around the world.[10] In Africa, more people are becoming sick from parasites known as schistosomiasis. Fish normally are able to keep these parasites in line when they eat the snails they live in, but because there are less fish, these disease - causing parasites are able to spread more easily, making many sick. [11] Another effect on the fish populations are jellyfish. Jellyfish are a natural competitor with fish for food, they eat fish eggs, and poison or swarm fish. As the fish population becomes smaller and smaller, the jellyfish populations are able to grow better and out number fish. As this happens, they continue to eat the food fish also eat, eat their eggs, and hurt fish, harming the fish population more and more in a sort of snowball effect whose end we might not be able to predict until it is too late.