Very beautiful fish, and i just wish i could own one, but honestly, both my red devil and oscar know people and food packaging, both are much more active to me than my gf, and also will only come to the top if i have the bio-gold bag in hand, they will eat other foods but can deff. tell what color bag is in my hand and react to it. just like when they see the ziploc bag full of frozen shrimp they both go nuts, and are in different tanks.