For decades, Joy dish soap was a “three-for” for commercial fishermen: They could use it to wash their dishes, scrub their fish holds and make a diesel spill quickly disappear.

But Joy is a killer that does more harm than good, said Rachel Lord, coordinator of the Alaska Clean Harbors program. Detergents and soaps hurt the environment by limiting the ability of acquatic animals to breathe, she said. “It’s really bad.”

Products that contain ammonia,…