Went to a LFS yesterday and he had a retic about 4"-5". The tip of the rays tail was white and a bit stringy. I am not planning on getting this ray but was interested at what this was. Sorry didnt get any pics.
^what they said, this happened to my ray right after i got it, she doesn't miss it at all and she has been living happy ever since. I thought it was weird because she didnt seem stressed at all when this was occurring, i guess i got lucky