OK shes now turning her back to the coral beauty and slaps her back fin on itBeanFish said:Could you upload a video to see the exact behavior? I think that would be really helpful. A picture is worth a thousand words, a video is worth even more.
You can upload it to youtube and post the link to the video here.
Other than that, just keep an eye on the tang, if it lashes out against the coral beauty you could try the big tang sticked to the glass method.