I cant help you, but be careful. Ive been to all the local stores within an hour or so of Albany in the past few weeks, and nobody local seems to know what a black arowanna actually is.
A certain store in Schenectady recently was trying to sell silvers as blacks for like $60. Apparently enough people complained and they cut the price in half and finally took the black part off of the tank label.
Have you ever been to Davey Jones Locker on Madison Ave? It's the only LFS that I will trust with no questions asked. Never had a problem with them, although they rarely get oddball or big fish in, and their prices are a bit higher.