My idea would be to get a blue-green piece of paper, some green strips of paper, and either fish-print fabric or fish cutouts. Put the blue-green paper as a background, then staple one end of the green strips at the bottom, then twist it up about three(more or less) times, then staple the top so it's not pinned flat to the board. Cut out the little fisheys and maby decorate them. Place them randomly all over the board. Thank you for combining my two favorite things, art and marine biology, sort-of.