I have an Australian harlequin tusk for sale. Approx. 6". Feeding on pellets and anything else that goes in the tank. First $200 take it. Must be able to pick up in Jackson, New Jersey.
I had a smaller one also. He was good with corals and inverts. Never bothered my cleaner shrimp or blood shrimp. Could be because the shrimp were there first. I don't know