Guitarfish, rays, and other bycatch are thrown overboard as waste off a boat near La Paz, Mexico.[Photo: Brian J. Skerry/Natl Geographic]

Overfishing is causing imbalances in ocean ecosystems and having devastating effects on both the fish targeted and virtually all other marine creatures.  85% of the world’s fisheries are fully to over-exploited, depleted, or in a state of collapse and 90% of the populations of large, predatory fish have already been fished out.

Unsustainable fishing, including bycatch and shark finning, and the results of overfishing are included in the presentation:

OVERFISHING – 170120

All PDFs of the Oceans PowerPoint presentations are available under “Educational Material”