Members of six fishing associations in Barrancabermeja and Puerto Parra, in Colombia’s Middle Magdalena region, are leading an effort to release Podocnemis lewyana, or Magdalena River turtles, that are accidentally caught during fishing activities. Throughout their fishing trips, every turtle caught in their nets is measured, tagged, and returned to the water. In the process, they are also gathering valuable information about the species. These fishermen have become sentinels for an emblematic species of the region, classified as Critically Endangered.