SYDNEY, Australia (AFP) — Virtually all of Australia’s shellfish reefs have disappeared, making them the country’s most threatened ocean ecosystem, scientists said Thursday, calling for more investment to rescue the important marine habitats. While recent global focus has been on the destruction of coral reefs, a study led by the Nature Conservancy found that between 90 and 99 percent of shellfish reefs have vanished since British colonisation 230 years ago. The reefs, formed by millions […]