VIDEO: Stunned tourists watch as Great White Shark devours seal at Alcatrez

WARNING: Some viewers may find this footage distressing.

Maybe those prisoners didn’t make it off Alcatraz after all…

Tourists have witnessed the shocking moment a shark devoured a seal at Alcatraz Island in San Francisco Bay.


The horrific attack was caught on camera by an onlooker and uploaded to YouTube on Saturday.

In the footage, seagulls can be seen hovering over a sea of blood after a shark, believed to be a great white, devoured a seal in front of shocked tourists.

“Holy moley,” a woman can be heard saying as the blood spreads in the bay. “Oh my gosh.”

The San Francisco Chronicle reported that the oceanic predators have been pushed north by warming waters.