Discovery: As rising levels of atmospheric carbon dioxide create more acidic oceans, their waters may start to smell funny and that change could prove possibly fatal to fish. New research has found that the larvae of two kinds of coral reef fish — clownfish and damselfish — lose the ability to distinguish the smell of predators from non-predators and fail to avoid the smell of predatory fish when raised in waters at acid levels predicted for the end of this century. As a consequence, …