Update: this species is no longer kept in KawaZoo, neither is Conraua robusta (which was actually the one that was seen last year as the goliath has been dead for a longer period of time).
Pity... though interesting about C. robusta! Arguably an even more special find as it is a more obscure species; whereas its larger relative used to be harvested by some for frog-jumping competitions. Perhaps C. goliath still exists in private hands, though I wouldn't be one to bet on it ...