Just before sunset on one of Hawaii’s premier stretches of beach, a sea turtle drags itself out of the surf and onto the sand to bask, as humans sunbathe and frolic nearby. A handful of people gather ...

Mac Poepoe grew up diving in the waters off Molokai to spear honu — Hawaii’s distinct species of green sea turtle — that helped feed his family. He often saw other fishermen hunt honu for profit, ...