Update: This video appears to have some questionable content. See the links in the comments for details.
Thanks, Mister Biggles
Unusual road sign says “Drive Slowly, Fish Crossing”—speed limit 40. Happens in vicinity of Skokomish River, Shelton, Washington, USA.
If the river floods the salmon take short cuts swimming across the road to go upstream to spawn. Happens almost every year .
Thanks, Jeff M