"In this high-resolution image taken from a remotely operated hexacopter, a Southern Resident killer whale named Slick (J16) is about to surface with her youngest calf, Scarlet (J50). Scarlet, born in December 2014, was the first calf in the so-called ""baby boom"" — nine orcas born between December 2014 and January 2016. These images are used to measure the length and width of orcas within an inch or two, allowing for ongoing observations of their physical changes. Photo: NOAA Fisheries, Vancouver Aquarium under NMFS research permit and FAA flight authorization."
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