D'oh! Sounds like Murphy has struck again! That's some bad luck. Every once in a while you'll get a fish that breaks the generality that's applied to it, sadly.. Like us fish have personality too. Even though their species may generally be reef safe you'll get the odd fish with a very non reef safe personality. This pretty much goes for every fish out there.

Mind you it could still be a territorial response. I've owned lots of inverts in my time and have lost a few antennae due to new addition aggressions. If the shrimp wasn't eaten right away, the antennae grows back and the fish in about a day or so is satisfied that she has shown the shrimp who's the boss and leaves him alone there after.

the shrimp is still alive this morning so that's good news. looked up what the wrasse is turns out its a pink marginal fairy. no more attacks on the shrimp thus far.....

Excellent! That is a pretty wrasse! Again, if your wrasse wanted to eat your shrimp the shrimp would be done by now. :-) He/she is probably satisfied that they've shown that shrimp who's boss and they will probably become BFF going forward :-)

man kien, I sure hope you're right. I really don't want any predators in my tank.

aside from eating tiny copepods, amphipods and worms, I would not consider your wrasse an invertebrate predator.