Need help with college work please!

[ekat90]

I'm trying to make a penguin game, where when I've controlled the penguin so that when the penguin is close enough to a fish, its commanded to say yum and for the fish dissapear, thats all fine but my only dillemma is even though I make the fish dissapear when I run the penguin over the invisible fish the penguin still says yum!. This is really really frustrating me and no matter what i read or do I cannot make the penguin only say it once, after its eaten it! please I'd appreciate any help.