Scientists released Dolphin S from her netted enclosure after strapping GoPro cameras on her body, calling her to follow their boat. Out in the waters of San Diego Bay, the boat came to a stop.

The thought of strapping a GoPro to the back of a turtle wouldn’t occur to most people, but Kyle Naegeli isn’t like most people. The young man from Katy, Texas, is a bona fide marine star. Naegeli, ...