Hello everyone, I know I have already posted regarding this topic, but I took some new pictures and would like some suggestions sooner than later. I think it is a tumor, but if it is not I would like to help my betta! His water quality is good, meaning his ammonia levels are 0 along with the nitrite. He has a 5.5-gallon tank (filtered and heated) with live plants and 2 snails. I have had him for 3 years and just recently this started to appear.