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The Most Important Fish in the Sea National Wildlife Magazine 1. Why are sharks considered apex predators? 2. By what rate have shark populations declined since the 1960s? 3. How have cownose ray populations responded to declines in shark populations? 4. What impact does the rising cownose ray population have on other species? 5. What does ‘functionally extinct’ mean? 6. How did scientists measure the impact of sharks on a specific (East coast) ecosystem? 7. What impact did Jaws likely have on shark populations? 8. What is finning? 9. Why is it difficult to protect shark populations? 10. What may be the ultimate result of shark population decline?
