Entourage star and SHFT co-founder Adrian Grenier is working with Oceana to raise awareness about the endangered bluefin tuna. In this newly released, call-to-action TV spot, nicely directed by Klaus Obermeyer from Aero Film, he goes for a swim alongside the massive, fast-swimming fish. For more, be sure to check out some behind the scenes footage of the PSA shot by GQ and Nautica.