Get some pics with over the tank bright white lights or 20-30 second video uploaded to YT and linked here. You can post videos here but the quality and loading time are not the greatest at times.
Back to the fish, yes ich or mucus cones from stress or water quality. Or it can be both. Post with the suggestion in my post and further analysis can be given. In the video looks like ich.
For ich QR with copper power or copper safe at 2.25 ppm minimum. And to be checked with Hanna HR Copper checker.