Well in my 55 gallon tank:
butterfly fish is all like "ya i'm just gunna stay up here and do nothing till you feed me"
then the Nandus Nandus goes "ok now either you give me more feeders or i'm gunna eat some of your other fish damn it!!!" (then he eats my non-feeder fish)
meanwhile my senegal is like "hmmm i'm gunna go eat a feeder and some shrimp.....wait i need a gulp of air, wait i think you are lookin at me, i better stair you down"
then the needlefish is all like "ya thats right i'm a needlefish i'm just gunna swim arounda bit"
and then my pictus is like "hmm i love this spot i think i'm gunna just stay here the rest of the day.....OMG is that food yum yum yum omg omg omg food food food MMMMMMMMMMMMMMMMMMM i love food yum yummy yummy......oh no more food....i suppose i'll just stay in this spot now"