User blog comment:IamJakuhoRaikoben/Chapter 357: The Nine Demon Gates, Review./@comment-5288632-20131025154455/@comment-2186265-20131025161102

Lahar thought he did but from what I could see Zeref clearly didn't want Acnologia anywhere Tenrou island, so it seems to me that sensed big and ugly rather than called. Though how he could tell what was going during the battle is still a mystery.