Hello! I am in charge of several 500+ saltwater tanks and one of my resident Atlantic Stingrays has suddenly developed a couple strange nodules that have appeared on his wings. I have taken a closer look to ensure it is not parasitic in nature but I haven't seen any evidence to support that it would be. If anyone has any advice what it could be or what the treatment for something like it might be i'd really appreciate it!! As would he. It literally sprang up overnight and I today at feeding I soaked his squid/shrimp in iodine. There are four other (3 southern, 1 atlantic) in the tank with him and they have not shown any sign of the same issue. Thanks so much!!