largest ive seen in person was 16" in a friends tank... like most other brachy's or "show cats" they are often out competed in a typical "community" setting, picked on, stressed and this leads to their early demise. Should b kept in its own tank or a tank built around the cat... not the other way around. I agree they are rare...and readily available at the same time. Tabla barba threw me for a loop, i remember them as "slobbering cats"...