Out in the northern reaches of the Caspian Sea, where Russia borders Kazakhstan there’s a war going on – and it’s all over fish. An epic struggle is being played out between competing gangs of poachers and the police. Caught in the middle is a rare and ancient fish, which is now dying out in its last stronghold. The stakes are high because this the sturgeon: a species prized for its flesh, but most of all for its black, glistening roe, better known as caviar. One giant beluga sturgeon, brimming with caviar can be worth up to $30,000 on the international market. Earth Report uncovers the story of how the sturgeon has been brought to the brink of extinction after 250 million years on the planet, and what chance there is to save it.