I put this in general because it involves more than just an arowana. So recently I have been trying to give my Red tail Giant gourami a better diet including vegetables etc. Today I decided to blanch some zucchini and try and offer him some assuming all the other fish (arowanas bichir and datnoid) would leave it alone. Boy was I wrong. The gourami got one 50cent coin sized piece. And the jardini made quick work of all the other pieces I offered. He wouldn't let the gourami get any. I sat there dumbfounded. Could this harm my jardini I wondererd? I have no idea....I was just amazed how readily he ate it....he seemed to like it more than market shrimp. How interesting. Anyone else experience this?