I am trying to remember the name of an old pc game we played in my hs comp class.

It was basically where the player was a fish. You started as a very small tiny fish, and as you swam around and eat other fish you grew and grew into a much bigger fish trying to get tot he top of the food chain.

Feeding Frenzy?

I'd say Fishy, but that's not really that old of a game. http://www.xgenstudios.com/play/fishy

Neither is Feeding Frenzy that old. I am not familiar with any DOS-based games like that though.

Shark Shark?

Edit:
Sorry, its actually Shark! Shark! and it was for the Intellivision, not PC. You might try and find a list of Shark! Shark! clones, as it sounds like your looking for a cone of this game.

Why get a clone when you can legally download the INTV game?

Intellipack vol. 3

Be sure to play Beauty and the Beast and B-17 Bomber was well (part of the pack). All great games that play better now with a keyboard than with the original controller.

http://classicgaming.gamespy.com/View.php?view=consoleemulators.Detail&id=15

Cool. I like Shark! Shark!. That game is awesome. Clones can sometimes be better than the original though. Who knows, maybe this clone of his is super awesome.

I just thought of another possibility though. It could be Odell Down Under. I played that one way before I knew about Shark! Shark! (its a lot newer though). I don't remember if it was good or not.