Coral banded shrimp lost an arm??

[mooch28]

Hey guys,

I bought a coral banded shrimp yesterday, and was fine all day. At night however, i went to look at him, and one of his big arms with claw fell off. Is this normal?? Will it regenerate or grow back??

I have small hermits in the tank, and i doubt they did that to him. The fish i have are clowns, coral beauty angel, butterfly, and a blue tang.

Is he gona be ok??