Yeah, a horrifying thing to see, but that fish die-off could very well be a natural occurrence, just like forest fires that appear to be disasters...and are!...but are still a natural part of the renewal of the land and the ecosystem.
Now, the tourists? That's a piss-off; one or more of them will likely get killed, and then the bear will be destroyed as a precautionary measure; having gotten a taste of idiots, it can no longer be trusted.
Society needs to embrace Darwin's theory with more vigor; they teach the idea of Natural Selection...survival of the fittest...in schools, and yet allow and encourage the wholesale breeding of morons...