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7 major threats to our planet's oceans

By: Catie Leary on Oct. 16, 2009, 11:22 p.m.
Bycatch in a fishing boat

Photo: Chris Seufert/Flickr

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Bycatch refers to marine wildlife unintentionally caught by fishermen in the pursuit of a targeted species. These animals may include sea turtles, porpoises, albatross, crabs, starfish and even fish of the targeted species that are rejected due to sex, size or quality.