On our shark expeditions over the past year - we ran into a fish causing a big problem in the Caribbean. It's the Lionfish. The problem is -- this is a Pacific species which has now made its way to the Atlantic. With no natural enemies, it can pretty much do whatever it wants. It's a fact which has scientists and researchers nervous. Fid out more in this report from the Shark Task Force. For more on sharks and the ocean, check out www.captainjon.com.