Add National Geographic to the growing list of studio going exclusively Blu-ray. Starting with its next release, “Sharkwater,” (that’s the trailer up there) the comapny will ditch its practice of supporting both HD DVD and Blu-ray. It’s only released one such movie so far, “Relentless Enemies,” so it’s not a seismic shift in the landscape or anything.

Warner distributes National Geographic releases, so it’s not really surprising that it went Blu-ray. BBC releases are the only ones under the Warner auspices that are still format neutral. We’ll see how long that lasts.

National Geographic Makes Move to Blu-ray Exclusivity (UPDATED) [High-Def Digest]