Sea of Shadows Official Trailer | National Geographic

(Dramatic music) - I have visual on their ship. This is organized crime.

Mexico Narco traffickers call totoaba the cocaine of the sea. The fishing of the totoaba by Chinese traffickers and Mexican cartels is killing the vaquita. The vaquita is getting extinct.

There were a hundred and then there were 60, and now there's fewer than 30. Come on, sweetie. Come on, mama.

[Man In Black] To stop the killing of the vaquita, we have to take down those traffickers. The whole thing stinks. It is corruption all the way. Who is...

[Woman] There are some really bad guys here. They don't wanna see us succeed.

(Placid music) - [Man In Black] If we don't save the vaquita, we will lose the most beautiful places of the planet. I keep thinking about the moment when only one vaquita will be left in the wild.

[Man In Blue] This is a war against the extinction of a species.

[Woman] We have to hold onto the hope that it's gonna work.

[Man] The poachers are unacceptable. They'll take any means necessary.

Clock's ticking.

[Man] We will fight for every single life. We won't stop.

(Mysterious music) (Water lapping)