Bruce is right. While growing up in the Islands I heard about the bleach horror stories, where divers open up bottles of Clorox into fish-filled caves in the coral reef. The main problem is that the bleach destroys the habitat, i.e. kills the living coral. Likewise, bleach in a river would destroy everything living, including the algae on the rocks. There are unique subsistence fisheries that exist where fish are poisoned in the river and are collected downstream. But the poison only affects fish, not other organisms or living things in their respective ecosystem. I'd be surprised and saddened if Elwha tribal members did this to their own river. Anyone with a stake the Elwha's anadromous resources should realize the short-sightedness of this harvesting method. Dynamiting rates higher.