Give some stream of consciousness and then the answer. The enduring popularity of the Christmas song "Rudolph the Red-Nosed Reindeer" has led to Rudolph often joining the list, bringing the number of Santa Claus's reindeer up to nine.

Answer this question: how many reindeers are there on santa's slay?
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This is the relevant information: The enduring popularity of the Christmas song "Rudolph the Red-Nosed Reindeer" has led to Rudolph often joining the list, bringing the number of Santa Claus's reindeer up to nine.
Therefore, the answer is nine.
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