SXSW Exclusive: 'The Great Invisible' Shines a Harsh Light on the Gulf Oil Spill

It's the first film about the 2010 Deepwater Horizon disaster and its aftermath.

For collective national trauma, few recent events can match the Deepwater Horizon disaster of April 2010, which killed 11 crewmembers and led to 87 straight days of crude oil gushing up into the Gulf of Mexico from the sea floor. (Remember the Oil Spill Cam?)

Now a new documentary premiering in competition at South by Southwest takes an unflinching look at how the worst environmental catastrophe in U.S. history -- with an estimated 210 million gallons of crude penetrating the region -- has ravaged the local ecosystem and the lives of the people who call it home.

Directed by Margaret Brown -- who previously documented the area in 2008's The Order of Myths, about the segregated Mardi Gras celebration held annually in Mobile, Alabama -- The Great Invisible marks the first film about the disaster.

In this exclusive sneak peek, Roosevelt Harris, a local food-pantry worker, explains how oyster farmers had barely recovered from Katrina when the BP oil spill wiped all seafood harvesting off the map.

The Great Invisible premieres at South by Southwest on Sunday, March 9 at 4:15 p.m. at the Stateside Theater.