The oceans are ailing. Marine biologists say there are many reasons -- pollution, coastal development. But a key problem is overfishing. Among the marine species threatened by overfishing are sharks. Millions are killed each year for their fins, which are a delicacy in Asia. The World's Julia Kumari Drapkin met two researchers trying to save sharks. She reports from the waters off Mexico's Yucatan Peninsula.
GlobalPost.com is now PRI.org
GlobalPost and PRI have joined forces to expand in-depth global news reporting to create a more informed, connected and empathetic world.Learn why See GlobalPost stories Dismiss