To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 TRO approach example. For explanation of layout, see caption for Movie 1. The dolphin surfaces about 13 seconds into the trial with another surfacing at about 48 seconds. Dolphin echolocation behaviour during active long-range target approaches Michael Ladegaard, Jason Mulsow, Dorian S. Houser, Frants Havmand Jensen, Mark Johnson, Peter Teglberg Madsen, and James J. Finneran Journal of Experimental Biology 2019. 222:None-None; doi: 10.1242/jeb.189217 Download Original Video