The owner of my LFS suggested I get a few Sally Lightfoot Crabs to control algae so I got one and it has been a model citizen! So yesterday I got a second one who is a bit bigger, and its the complete opposite. Its bullying the other crab, my peppermint shrimp ,my wrasse, and my blenny(who is dishing it back now). My question is are these crabs actually able to kill the other verts or fish? The LFS guy said he couldn't and would likely be the other way around. I am reading so many contradicting experiences. Has anyone actually seen one of these kill one of their tankmates, fish in particular?