i can just see the difference between the first picture you posted and the second.
mine was an extream case as i thought ide killed mine, honestly they went stiff and did not move like they were dead. i managed to bring them back.
if yours isnt "melted pattern" then you truly have a unique ray.
ide love to see it again in a few months after perfect water and good food.
just checked it again and im sure the pattern has melted in the second pic.