I have a 55gal reef tank and recently added a Sally Crab and a week later my angel fish turned up dead.
Are Sally Crabs aggressive toward other fish at night?
I would'nt doubt that the Sally killed your fish. When i had my sally it was fine at first, but 6 months later it became a fish killer and a zoa eater
Feduke
your typical size sallylightfoot should not be able to kill a normal size healthy dwarf angel (not to mention a large angel). They are fast as all get out but have nothing much in the way of pinchers. usually you need a pretty big sally or pretty tiny fish for them to be fish killers. Mine never killed any fish small or large or green emerald crabs or fireshrimp. It did start eating zoo's like fish food at which point it went to the LFS after about 6 months of having it.