The act of exsanguination, when applied to fish, involves severing major blood vessels to facilitate the drainage of blood from the carcass. This process typically requires making a precise cut near the gills or tail, allowing blood to flow freely. For example, a sharp knife can be used to sever the gill arches, promoting rapid blood expulsion.
Removing blood from a fish carcass significantly improves flesh quality. It reduces the presence of strong, often undesirable, flavors, resulting in a milder taste profile. This practice can also extend the shelf life of the fish by slowing down spoilage. Historically, this technique has been employed by anglers and commercial fishermen to enhance the market value and palatability of their catch.