Fishing for Love programmer speaking! This is the main, severe bug that arose during my-VCSpocalypse panic. When that happens, you have been eaten. This is *supposed* to reduce your size, so that you can match a mate who starts the game smaller than you (or get smaller, if you've grown in the process of acquiring traits.)
However, the replacement player model is incorrectly generated, and misplaced with respect to the player controller and camera. At times, you can just barely tell that you *do* have a fish, but it's the wrong fish, and you can only see it from certain camera angles.
We'll be finishing the game, and a complete overhaul of the eating/getting eaten mechanics code is my first job.