I was more thinking of attacking themselves. From what I read up on the algae eating shrimp, they will eat pretty much anything, including dead fish. Also, if not enough algae is present, they will eat the plants, favoring the Java Moss which I already do have in the tank in qualntities. I was contemplating ghost shrimp but the LFS had a resent occurance of a larger ghost shrimp shredding another fish with the claws.