The hidden forest stretching 200 miles beneath the ocean

Dwayne Fields drives along California's Highway 1 to explore life beneath the waves. He meets volunteers from Reef Check, who are working to protect the West Coast's fragile marine ecosystem. Along this coastline lies a vast underwater forest of giant kelp stretching for around 200 miles, providing a vital habitat for marine life.

This video is from The Travel Show, the BBC's flagship travel programme.