"Sea of Shadows" is a documentary film that explores the illegal fishing and wildlife trafficking occurring in the Sea of Cortez, a vital marine ecosystem in Mexico. The film highlights the plight of the critically endangered vaquita, a small porpoise, and the efforts of conservationists to protect it from extinction due to illegal gillnet fishing. The documentary follows a team of activists and scientists as they confront the challenges posed by powerful criminal organizations involved in the black market trade of totoaba fish, whose swim bladders are highly valued. Through their journey, the film raises awareness about the urgent need for conservation and the protection of marine life.