Salmon have hard time sniffing out danger

As if salmon didn’t have it tough enough, you know, with the whole “swimming all over the globe before coming back to the river where they were born” thing.

Turns out they are doing it without one of their major senses.

Scientists have discovered that salmon are losing their sense of smell, the result of the acidification of the oceans, reports PBS. Smell is one of the primary ways fish detect predators.

Closer to home, the salmon face the prospect of a Columbia River system overflowing with hungry smallmouth bass.

This story was originally published June 6, 2017 at 7:12 PM with the headline "Salmon have hard time sniffing out danger."