VIDEO: Fish vital to pearl mussel breeding

BBC: Thousands of baby fish are being released into Northumberland rivers as part of a project to increase the numbers of an endangered mollusc. Pollution has had a massive impact on the ability of pearl mussels to reproduce, as the species can only survive in very clean water. But the pearl mussel also depends on healthy fish stocks, as its fertilised eggs must latch on to fish to develop. Scientists working at the Kielder Hatchery have successfully implanted mussel larvae into the gills of......

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