Looking for a certain Apple II fish game

Hey,

I'm looking for info on an old fish game that I played on my grandfather's computer many years ago...I think it was for Apple II, and the fish were Dolly Varden, mackinaw, chubb, rainbow trout, etc., and you had to eat other fish and avoid an osprey (this basic description was obtained from http://nslog.com/archives/2004/08/03/earlycomputermemories.php).

Does anyone know what this game was called? Thanks!