Sally lightfoot crabs?

[TAZ]

Hi all,

Last night when my wife and I came home from work we discovered that our Linckia Starfish had two huge gashes in two of his arms and was now dead He had been in the tank for about a month and was doing great, he moved around a lot but did seem to have one favorite spot in tank. This spot also happened to be close to the area that our Sally Lightfoot crab hangs out, so our thoughts are that crab got him. Has anyone else had any issues with their Sally lightfoot crab? Are they usually aggressive to other tank inhabitants?