Tami Kaschke spends six months out of the year researching, tagging and tracking great white sharks off the coast in South Africa.

She's been a research assistant for Dyer Island Conservation Trust Research for the past ten years after coming across the opportunity on "Google's Top Ten Cool Ways to Volunteer."

However, Kaschke says their numbers are drastically dwindling.

Each year, 200 million sharks are killed from shark finning.

Only ten thousand great white sharks remain around the world.

"Some of the areas have been over-fished that there is nothing left for them to eat, so they've had to go out to other areas and go after different prey, so that's one of the theories," Kaschke said. "Recently, we've had orca's attacking our white sharks for their liver and one of the theories is, some of the natural prey for the orca has been so far removed that they've had to start looking for other food sources and unfortunately white sharks became on their menu."

In the United States, there is a push in Congress to ban the sale of shark fin pills across the country. A bill to ban the purposeful killing of sharks and rays is gaining steam in Hawaii.