A 6-foot long snake -- believed to be an anaconda -- just bit a dancer during a VMA run-through for Sunday's show ... TMZ has learned.
Nicki Minaj was on stage performing her hit, "Anaconda" when a female dancer was bit by the reptile in front of everyone.
We're told the dancer has just been taken to the hospital where she's being treated.
Anacondas are non-venomous snakes but often transmit bacteria that can lead to serious infections.
The snake was removed from the stage in a container.
It's unclear if the show will 86 the snake for the live telecast.
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