"The world is looking for bold leadership at every level to tackle climate change and environmental conservation issues," the actor says.
The critically endangered vaquita could be gone by 2018.
They'll be deployed in Mexico this spring to help locate the world's rarest marine mammal.
There are fewer than 60 of the planet's rarest marine mammal. Scientists hope their capture plan will change that.
Fewer than 60 vaquita are left, but with swift action there's hope for their recovery.
The demand for illegal fish bladders is driving the vaquita's demise.
The world's rarest porpoise may finally have a chance to come back from the brink. Read more on The Dodo