Sandeels are small, elongated fish belonging to the family Ammodytidae. They are typically found in sandy coastal waters and are known for their slender bodies and pointed snouts. Sandeels play a crucial role in the marine food web, serving as a primary food source for various predators, including seabirds and larger fish. These fish are often used as bait in commercial and recreational fishing. Sandeels are also important in the fishing industry, particularly in regions like Scotland and Norway, where they are harvested for use in fishmeal and as a food source for farmed fish.