Shark trapped in fishing net
Net on seafloor
Coral and fish
Waterway at sunset
Coral
Coral reef not covered by water
Aerial view of islands
View from space of an algae bloom
Aerial view of island
1 of 9
Trapped Thresher Shark

Doomed by a gill net, a thresher shark in Mexico's Gulf of California is among an estimated 40 million sharks killed yearly for their fins. Removing top predators, such as sharks and bluefin tuna, from the ecosystem can degrade marine habitats.

Photograph by Brian J. Skerry

Ocean Habitat Destruction

See photos of examples of ocean habitat destruction (such as bleached coral, bottom trawlers, and more) in this photo gallery from National Geographic.

November 12, 2009

Go Further