in my 60litre comunity aquarium i have a freshwater shrimp(one angel,5 glass cats,small plec) given to my by a friend when he broke his tank, and a couple of days ago i found one of my glass catfish dead ...(could be the angel you say) thats what i thought until i seen that the glass cat was untouched apart from a missing head and some pretty prescise v cuts in the pelvic fin. im not shure on the type of shrimp but i think its a freshwater shrimp...but he is pretty well equiped-about 3" long, razor running down his head,a nice set of pincers and two 5" antennas which i beleive he feels the fish with at night to catch them. is this usual for a shrimp to kill? i feed him and the plec an algae wafer every night,blood worm every other night and catfish pellets occasionaly. thanks in advance.