Share
Copy

Killer Sharks vs. Killer Whales

Two fierce predators face off in a showdown atop the ocean food chain on Nat Geo.
04:27 | 02/28/2013

Transcript for Killer Sharks vs. Killer Whales

When it comes -- fearsome creatures that lurk beneath the waves sharks have long held the upper hand in everything from horror movie casting today. Reelect he -- nightmares but they're not course the... See More
This transcript has been automatically generated and may not be 100% accurate.
Now on ABC News is always on.
Coming Up
9:00 AM ET
GMA Live
9:15 AM ET
News Pop
9:30 AM ET
Opening Bell
10:00 AM ET
News Pop
10:30 AM ET
Headlines & Weather
MORE VIDEO
Sections
Shows
Watch the Full Episode
Nightline 04/23: Herbalife Investigation: American Dream for Sale?
ABC's Brian Ross gets answers from Herbalife, Ryan Lewis' Reveals Mom's HIV Struggle

Herbalife Investigation Part 1: American Dream for Sale?

Herbalife Investigation Part 1: American Dream for Sale?

ABC's Brian Ross gets answers from company under federal investigation.

Herbalife Investigation Part 2: The Whistleblower

Herbalife Investigation Part 2: The Whistleblower

ABC's Brian Ross speaks to former Herbalife executive being paid by Wall Street hedge fund manager.

Ryan Lewis Reveals Mom's HIV Struggle

Ryan Lewis Reveals Mom's HIV Struggle

Lewis, of the Macklemore & Ryan Lewis rap duo, says his mother has been HIV positive for 30 years.