Sharks, rays and seahorses are on the road to extinction. East coast cod has declined 96 percent over the past 150 years. But magnetic fishhooks are helping to save sharks, and just in the nick of time.
85 percent of oyster reefs have been lost globally. In many bays, once-plentiful oyster reefs are now functionally extinct. But shellfish lovers shouldn't panic -- most of the oysters they eat today are farmed.