About a week ago I noticed my BTA was getting very wide and flat like a pancake. There have been multiple rows of tenticles growing around the perimeter over the last few weeks. A few days ago I noticed it was looking more figure 8 shape. I also noticed the foot was spread widely over the rock. Today I noticed that the mouth of the BTA is no longer in the center, it has drooped to one side. By no means was I expecting this, I just moved him from the top of the tank to the bottom of the tank about 9 days ago. At about the same time I started feeding heavily. Now that I really believe it's splitting, I will take pictures daily if not more often to try to capture the action. I Just confirmed that it was splitting today, but I can say by his behavior now, he's been visibly at this about 3 good days. Here is a picture of the BTA today.
I had to take this with the laptop, I didn't have my regular camera today.