I posted a thread about a month ago about this spot on one of my male rays and was told that it looked like a nip from my other male ray and not to worry about it. But in the last couple of days there is now the same spot on his other side and it's bigger. He has also started to stay in this back corner of the tank, which is really odd for him b/c he is the more active of the two rays.
Thanks for the opinions.



