When they are finally removed from the ocean they are found scaleless, eyeless, and sometimes in a mushy state. This makes their price at market greatly decrease. The imperishable net is make of nylon and does not circum to the effects of weathering. This is a problem for sea life that gets caught up in discarded web-like nets. Miles of ghost nets scatter the bottom of the ocean floors and will continue to entangle and kill for generations to come.
Pollution is a major contributor in terms of global resource destruction.
We have used the ocean as our dumping ground for centuries, which was not a huge problem until this century. The global population explosion combined with our new ability to develop toxic chemicals is more than the seas can handle. Fisheries are especially damaged when pollution, mainly runoff, concentrates in coastal zones and estuarine waters. Animal waste is also a problem which causes algal blooms, and eventually dissolved oxygen depletion due to nutrient addition to the water. Nuclear reactors, oil refineries, and other industries all add a complex mix of chemical, oil, toxic and radioactive waste.