High resolution video cameras on ONC’s seafloor observatories offer a rare glimpse of undersea life from the northeast Pacific Ocean. Anyone on the planet can visit these unique 24/7 live portals to view the mysterious undersea world. Once in a while, the keen eye of a citizen scientist observes something quite remarkable—like a mass migration involving thousands of tanner crabs.

“Why are these crabs massing at Barkley Canyon?” asked a postal worker from Minnesota. ONC staff scientist Fabio De Leo weighs in on this rarely viewed event.

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