When Rupert Wingfield-Hayes visited the Spratly Islands in the South China Sea, he found Chinese fishermen were deliberately destroying coral reefs. <br />Poachers were revving the engines on their boats sending clouds of black diesel smoke pouring into the air - and under the water, were piles of shattered white coral branches. <br />As he reports, some of the fishermen were also catching massive giant clams, at least 1m across.
