public void euthanize() {
        ArrayList<Fish> magikarps = new ArrayList<Fish>();
        for (Fish a : fishies) {
            if (a.getAge() == a.getMaxAge()) {
                a.setHealth(0);
                if (a instanceof Magikarp) {
                    magikarps.add(a);
                }
            }
        }
        if (magikarps.size() > 0) {
            for (int x = 0; x < magikarps.size(); x++) {
                fishies.add(new Gyarados(magikarps.get(x).getX(),
                        magikarps.get(x).getY(),
                        bounds));
            }
        }
    }