question about shrimp

[4ptbuck]

My CBS seems to behave.
He lives with a skunk cleaner.
I think CBS are actually a cleaner shrimp and I caught him cleaning my sailfin tang once.

He does do a lot of posturing when my hand is near him, or if a fish gets in close.

I don't think he has killed any fish, but I am sure he had snacked on some dead/dying ones.