Bibliographical noteFunding Information:
In Peru, we thank the Pacifico Adventures crew—in particular, the skippers Luis Chapas, Alex Marchan, and Aldo Muñoz. We thank the tour guides of Linblad Expeditions for providing sighting information at the Galápagos. In Ecuador, we thank Palo Santo Travel Tour and the skipper Jaime Parrales. Research in Puerto Lopez was funded by the Pacific Whale Foundation (PWF). PWF also thanks Marcel Morais, Luna Barragan, and Annie Macie.