Anglers savvy to this interspecies interaction know to scan for the gar, which break the water's surface to breathe. This is commonly called "rolling" and is identifiable when the gar's large yellow tail appears above the surface. If you spot a trout lying next to a gar, the trout will respond best to a slow-sinking soft plastic lure such as a Shad Assassin, a B & L Corky, or a Mir-O-Lure Catch 2000. Cast alongside the gar, and pick the trout off from next to it. But don't make the cast too close. I had the bright idea to bounce my lure off the gar, which resulted in the gar speeding away and the trout disappearing in a cloud of silt.