Hammer Head Coral

For the last month or so my hammer head coral does not look like it should. The tenticles or polyps have completly changed there shape. The tenticles and not fully opening as well. The wierd thing is,  I have two tanks with the same situation.  It is hard to tell. In this picture the polyps are out but in the wrong shape. A month ago they looked normal and they look bad in both tanks. All of the other corals seem to be doing well. Does anyone know if this is bacteria or? All of my water perm are good.