This article talks about bycatch, which is sometimes refered to as bykill or dirty fishing. Bycatch is a mix of young of low-value fish, seabirds marine mammals and sea turtles often considered useless and is thrown back dead or dying. Elliot Norse makes a good point when he said "If a hunter is hunting for elk, he's not killing sparrows, eagles, coyotes, and pronghorn," Elliot Norse is the president of of Marine Conservation Biology Institute (MCBI) in Redmond, Washington.
A recent study was conducted and found that only 10% of sharks, swordfish, and other large preditory fish remain in the worlds oceans after only 50 years of commercial fishing. Without immediate action, they could go the way of the dinosaurs, warns study author Ransom Myers, a fisheries biologist from Dalhousie University in Hallifax, Nova Scotia.
Look at the link for things they are doing to try and eliminate bykill. They have come up with some pretty good ideas so far however it is still not enough.
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