(CNN) Why did the salmon cross the road?

Simple. To have babies, at least according to Alexis Leonard, a fish hatchery specialist who recorded the video of more than a dozen salmon swimming across a flooded US Highway 101 in Shelton, Washington, on Saturday.

Leonard and her father were headed back to Eells Springs Trout Hatchery when they came across the first salmon.

"We kind of saw one fish dart across the road," she said. Leonard recorded the video for her sister, who had never seen fish swimming across a road, and also posted it on Facebook. The video quickly went viral. As of Tuesday afternoon, it had more than 6,300 views.

This isn't an unusual occurrence in Washington, Leonard said. Salmon in the area typically come from the Skokomish River and inhabit the creeks in order to spawn, or have babies. When there's heavy rain, Leonard said, the creeks flood, sending the fish everywhere.

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