Salmon has long been at the heart of the culture and livelihood of coastal dwellers. Most peoples of the Northern Pacific shore had a ceremony to honor the first return of the year. For many centuries, people caught salmon as they swam upriver to spawn. A famous spearfishing site on the Columbia River at Celilo Falls was inundated after great dams were built on the river. The Ainu, of northern Japan, taught dogs how to catch salmon as they returned to their breeding grounds en masse.
"Blast fishing or dynamite fishing describes the practice of using dynamite, homemade bombs or other explosives to stun or kill schools of fish for easy collection. This practice can be extremely destructive to the surrounding ecosystem, as the shockwaves often destroy the underlying habitat (such as coral reefs close to a coastline) that supports the fish. The frequently improvised nature of the explosives used also means danger for the fishermen as well, with accidents and injuries."