A group of large, female great whites are migrating to Guadalupe for one last big feed of seals before going off to have their pups. Dr. Mauricio Hoyos believes after feeding they head to a biosphere reserve on the cost of Baja. Now, Dr. Hoyos joins Michelle Jewell and Toby Daly-Engel to track the sharks to Baja, use genetics to identify which pups belong to which females and confirm a birthing ground to be protected.
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