The hungry lionfish devouring Florida's coast

American and Caribbean coral reefs are facing one of their biggest challenges yet - invasion by an exotic fish.

Lionfish are native to the Indo-Pacific, but have spread to the Western Atlantic where they have no natural predators to keep them in check. With a voracious appetite, they eat almost anything in their path - posing an extremely potent threat to native marine life.

(Image: A lionfish. Credit: Getty Images)