Over three quarters of our planet are covered by the oceans. Their biodiversity is unmatched and they contain over 80 percent of all life on earth, mostly unexplored. Millions of people worldwide are depending on the oceans for their daily livelihoods. More and more all this is endangered because of ignorance and a global lack of management . Overfishing.org is an independent source of information on the most dangerous threat our oceans are facing today.
Overfishing is a form of overexploitation where fish stocks are reduced to below acceptable levels. Overfishing can occur in water bodies of any sizes, such as ponds, rivers, lakes or oceans, and can result in resource depletion , reduced biological growth rates and low biomass levels. Sustained overfishing can lead to critical depensation , where the fish population is no longer able to sustain itself. Some forms of overfishing, for example the overfishing of sharks , has led to the upset of entire marine ecosystems. 
Ocean overfishing is simply the taking of wildlife from the sea at rates too high for fished species to replace themselves. The earliest overfishing occurred in the early 1800s when humans, seeking blubber for lamp oil, decimated the whale population. Some fish that we eat, including Atlantic cod and herring and California's sardines, were also harvested to the brink of extinction by the mid-1900s.
1. What is overfishing 2. Why is overfishing a problem 3. What can I do to help 4. Where can I find answers