My betta had advanced body rot. He was close to death, but survived. Here is a comparison from then and now- a year later! (story in comments) : r/bettafish
Beware Of Body Rot | page 3
How to identify Dry Rot in buildings | Preservation Expert
Latex Body Rot | Styleplanet
LASCANA BODY - Body - rot/red - Zalando.de
Hunkemöller – Kiki – Tief ausgeschnittener Body aus Spitze in Rot mit Netzstoff-Detail | ASOS