public class Fish {

	private int weight;
	private int tagId;
	
	public Fish( int weight, int tagId) {
		this.weight = weight;
		this.tagId = tagId;
	}
	
	Fish feed( int additional ) {
		return new Fish( this.weight + additional, this.tagId);
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}