Arowana! Now I admit, I work for a Petco, as their Fish and reptile "specialist". But unlike most petco employees, I actually give a S@$#, and have been keeping fish most of my life, only work for them because its a job, ya know? Whenever I order out of the norm, large fish(IE arowana, knives, shovelnose cats, etc), I always put as much info as I can on one of the little ID cards, such as 100 PLUS GAL TANKS ONLY, etc and tell people NO, sorry, you cant buy this.. I can't say I've seen any other petco, petsmart or other store do this. So WARNING: LARGE TANKS ONLY!