Seraphina seems to have scraped a couple of scales off on her head, probably shortly after I added her little stone cave and she kept playing with a bubble inside it. At first I was worried she'd developed a fungus of some kind as it was white and fuzzy looking but since she acted like nothing was wrong, kept eating, and I had reason to suspect she'd scraped herself, I decided to just observe her.
It's been a few days and the spot has gotten smaller and while white, no longer appears fuzzy. She continues to eat and act happy and normal, so I'm very relieved. I'll continue to monitor it, however.
Anubias Nana still appears healthy and hasn't had any die off despite its jaunt through freezing temperatures.
Seraphina - female halfmoon