I`ve had one for 6 yrs now. IME Mine has not taken out any fish or corals. I really dont know about inverts because I really dont keep up with numbers since I have so many. But here is the flip side. If you are getting a Reef lobster
to watch him then you`ll be surely disapointed. I have seen mine probably 5 times in 6 yrs. They hide in the daytime and move around at night. They hide in your LR
. If you are satisfied like me knowing that he`s there doing his janitor work then you`ll be OK but if you are getting him to be the showpiece of your tank you are going to be disapointed. Here is mine at night after lights out from several months ago. Not a good pick I know but they dont come out in the open for nothing.