Yesterday went to a new lfs, they had some great inverts, my boyfriend really loved this huge arrow crab, it is like 5". I asked the lfs guy about them and he said that it should be fine in my 72bow front with my other cleaner shrimp. I also got some sally's and 2 huge emerald crabs. Well I come down this morning and the arrow crab is eating my fire shrimp, which of course was my favorite and cost me the most! So now I have been reading this board finding out all kinds of horror stories about these guys. So I told my boyfriend that if he eats another shrimp he will go into the tank the puffer is in and become puffer food!