Classic Mac Games

Does anyone know the name of this game?? I used to play it back in the 80's in elementary school. You were a little fish and had to eat other things like algae or other fish depending on what sort of fish you were. You also had to avoid being eaten by other fish, birds, and seals. Does anyone know what this was called??

Oh, I know what game you're talking about - but heck if I can remember the name! I loved that game back in elementary school - on the Apple ][e, right?

Oh man, I hope someone comes through. It sounds like that was the advent for games like Crystal Quest, one of my favs.