Wild Cameramen at Work S01E04 - Sea

In the last of this spectacular series on the work of the world's top wildlife film-makers we enter the literally breathtaking environment of the ocean depths. Cameramen Doug Anderson and Doug Allan reveal the technical challenges of filming beneath the waves and encounter animals as diverse as blue whales, white-tip sharks and the unforgettably named weedy sea dragon - a tiny creature whose courtship dance is as tender and graceful as any ballet.