With sick and dead dolphins washing up on shores around the world, experts are worried and a bit baffled.
Several mass deaths of dolphins have occurred over the past few years and while experts are worried about the die-off they say we are not witnessing a global population crash.
But what is behind the resent mass strandings and deaths is complicated and, inevitably, involves humans.
For example, the bottlenose dolphin die-off in Gulf of Mexico started in early 2010, even before BP’s massive oil spill in April 2010. Disease was linked to some of the hundreds of Gulf dolphin deaths, but not all of them. The ultimate cause remains mysterious.