MIT/WHOI Joint Program graduate student Julie van der Hoop (center, in blue), Courtney Yanovitch and Dallas Vandenberg, both of Dolphin Quest, prepare for the next round of testing. Dolphin Quest trainers taught the dolphins to follow a remote-controlled boat with a sensor on it that tracks each dolphin’s speed and duration of the session. The dolphins perform the task while wearing tags and also without. (Michael Moore, Woods Hole Oceanographic Institution)

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MIT/WHOI Joint Program graduate student Julie van der Hoop (center, in blue), Courtney Yanovitch and Dallas Vandenberg, both of Dolphin Quest, prepare for the next round of testing. Dolphin Quest trainers taught the dolphins to follow a remote-controlled boat with a sensor on it that tracks each dolphin’s speed and duration of the session. The dolphins perform the task while wearing tags and also without. (Michael Moore, Woods Hole Oceanographic Institution)