Every image was matched within and among all collaborator catalogs. One individual ID per catalog was allowed. Thus, if individuals were found with duplicate IDs due to false negatives (where a previously undetected match of one whale with two or more separate IDs within a collaborator catalog wa...
A humpback whale nudged and prodded marine biologist Nan Hauser for 10 minutes before she realized it may have been protecting her from an even more dangerous predator.(Image credit: Nan Hauser/Caters) Would you let a humpback whale beat you up to save your life?