There are no remains of the domino anywhere. I found the 3-stripe and removed him from the tank. After looking him over I found a nice little chunk out of the top of his head. I took advantage of having the rock all apart so I scooped out the emerald crab and took him back to the petstore. (They floated the bag to acclimate him back to their tank).
So at this point i have lost the Domino, a 3-stripe, and have removed the emerald because I am betting my tank doesnt have enough algea to keep it filled up enough to not attack my fishes.
From what i have read and what you guys have suggested about emerald crabs this is more than likely the COD for my poor fishes... (Lessons Learned ehh?)