Shark Week is upon us, premiering tonight on Discovery at 9pm, and the official website’s Shark Cam kicks off with a “dive tour at 12:30 p.m. ET, a sand tiger and hammerhead shark feeding at 1:30 p.m. ET, and a whale shark feeding at 3:00 p.m. ET.” More information. Videos after the break. Click here for more pictures of various sharks — courtesy of Discovery.