Last week on “Late Night with Conan O’Brien,” Conan mentioned a fake website, www.HornyManatee.com, during a comedy piece that involved, well, a horny manatee (specifically, the F.S.U. Webcam Manatee). Turns out, if you mention a fake website on TV you’ve got to buy it for $159. So “Late Night” bought the site and then built it; fans have flocked. This is a curious story about a horny manatee and the Internet, intertwined within the world of late night television, as told by Conan himself. In the clip, the manatee appears first, then Conan tells the tale.