So I was walking into my bathroom where I keep my boys Buckminster (HM cellophane) and Casper (opaque white PK) in a divided tank. Normally Casper is on the left with the filter and Buckie is on the right, always in view. Today however, I walked up to see Casper swim eagerly up to me on the RIGHT side and Buckie nowhere in sight! Panicking, I looked all over, and found Buckminster chilling in the plants on the LEFT. I looked them over and there wasn't a single nip taken out of both of their fins. They just switched! I am now freaking out about fixing the divider but it will be hard because it is a bow tank. I honestly thought I had gone insane for a second!