Threats to Sharks

Sharks have inhabited Earth’s oceans for 400 million years, but today they are disappearing at an alarming rate.

Because they are very slow to reach reproductive age—anywhere from 12-15 years—and typically only give birth to one or two pups at a time, sharks have great difficulty recovering their populations after extreme depletions. Of the 465 assessed species of sharks living in our oceans, 74 are currently listed as threatened (including 11 species which are critically endangered) on the International Union for Conservation of Nature (IUCN) Red List. The IUCN has estimated that one quarter of all shark, ray and chimaera species are threatened with extinction.

Shark Finning

While it is impossible to know how many sharks are killed yearly due to illegal and unrecorded catch, it is estimated that up to 73 million sharks are killed annually by “finning” alone—a brutal practice that involves cutting off a shark’s fins, usually while it is still alive, and throwing the body back overboard where it either bleeds to death or drowns. The fins are then used to make shark fin soup, a traditional Asian delicacy.


In addition to being taken intentionally for their fins, sharks are often accidentally caught up in fishing nets and on lines – a practice called “bycatch.” When lines are unattended, such as in some longline fisheries, the toll can be particularly high.


More on Sharks: Defenders in Action »

You may also be interested in:

© Ed Gullekson
How You Can Help
Help put an end to the brutal practice of shark finning. Join us in calling on FedEx to ban all shipments of shark fins!
scalloped hammerhead, © Terry Goss 2008/Marine Photobank
Success Story
September 2014 - Five species of shark and two species of manta ray have officially gained international protection!
Hammerhead Shark, © Tui De Roy / Minden Pictures
In the Magazine
New Hope for Hammerheads; From Doves to Condors; Wolverine Woes