Cod and other commercial ground fish are caught in a net in the Gulf of Maine.
Photograph by Bill Curtsinger via National Geographic

This is a really nice photogallery published here by the Natioanl Geographic website. It's about the overfishing a problem that it's not affecting the public opinion as much as it should. It's enough the following statement to understand the real size of the emergency:
"Seventy-five percent of fisheries are overfished, if nothing changes, all fisheries will have collapsed by 2050." says marine biologist Enric Sala.
"The solution is involving all levels of society, from consumers to policy makers.
The solutions exist, we just need the political will to implement them at a large scale"
In my own small way I invite you to visit the National Geographic gallery and to read all the interesting captions of the pictures... there a lot of interesting facts to learn about. After that you may also find interesting a post I've written about the Bluefin Tuna a king of the oceans whose own survival is in extreme danger due to overfishing.


A purse seiner net is used to haul tuna to coastal feeding pens
Photograph by Paul Sutherland via National Geographic


Bottom trawling—a form of net fishing that scrapes the ocean floor—often damages habitats by ripping up coral reefs.
Photograph by Brian Skerry via National Geographic


Fishermen haul in a bluefin tuna caught in the old Mattanza method.
Photograph by Brian Skerry via National Geographic


Atlantic bluefin tuna considered some of the best sushi in the world.
Photograph by Justin Guariglia via National Geographic


A hammerhead shark is fatally caught in a gill net in Mexico's Gulf of California.
Photograph by Brian Skerry via National Geographic


Atlantic Cod
Photograph by Randy Olson via National Geographic


Fins of thresher sharks are cut off and collected on the shores of San Marcos Island, Mexico.
Photograph by Brian Skerry via National Geographic


Fishermen pose with a giant carp caught in the Tonle Sap River in Cambodia.
Photograph by Andy Eames/AP via National Geographic


Dead guitarfish, rays, and other species are tossed from a shrimp boat in the Gulf of California, Mexico.
Photograph by Brian Skerry via National Geographic


Salmon is sold at a Tasmania market.
Photograph by Ian Waldie/Getty Images via National Geographic


Fisherman catch tons of live carp at a fish farm near Warsaw, Poland.
Photograph by Katarzyna Mala/AP via National Geographic