Image Hotspot with hidden icon

I love using Image Hotspot but sometimes I don't want to tell the students where the hotspot is. Can there be an option to have a hidden or invisible indicator? The current one I am working on is an image where the students have to find the various services in the image. 

I have also tried to create this in a Multiple Hotspot because I know the indicator in this application is hidden but I then can't add individual feedback or information for each hotspot.