Most fish need to be scaled before cooking, though a few, such as salmon, have tiny scales that do not need to be removed. A small number of fish, for example shark, have none at all. Scale fish outdoors or on a draining board. Here, bream is shown.
With a fish scaler (shown here), a curry comb or a serrated knife held at an angle, scrape off the scales, working from tail to head. Rinse the fish often under running water.