You are able to entangle opponents with the coils of your whip.
Benefit: While wielding a whip, you threaten the area of your natural reach plus 5 feet. You can also use a whip to grasp an unattended Small or Tiny object within your whip’s reach and pull that object into your square. To do so, you must hit AC 10 with a melee touch attack. Further, you can use the whip to grasp onto an object within your whip’s reach, using 5 feet of your whip as if it were a grappling hook, allowing you to use the rest of your whip to swing on like a rope. As a free action, you can release the object your whip is grasping, but you cannot use the whip to attack while the whip is grasping an object.
Pathfinder Roleplaying Game Ultimate Combat. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.