A reimanni snakeneck. I should note that I wouldn't expect this to work out for everybody. My turtle was one of two the vendor had from the same clutch, and even though I got mine at a very small size, the other one had already gained 1.5'' on it due to being the more aggressive eater. They had to separate them so mine would get a chance to eat. Ultimately, my reimanni gets really excited about food (every time I come home she does a crazy turtle voo-doo dance) but is an incredibly poor hunter, so I think that helps.