English: The technique known as clearing and staining is used by functional morphologists to stain certain tissues specific colors (like bone red and cartilage blue), while digesting unwanted tissues or making them transparent. This technique is great for easily identifying anatomical structures, such as the fine gill rakers in this menhaden used for filter feeding. This is a photograph of a cleared and stained specimen created by Noah Bressman at Wake Forest University; the colors are not altered digitally.