Sand eels, also known as ammodytes, are small, elongated fish found primarily in sandy coastal waters. They typically measure between 6 to 12 inches in length and are known for their burrowing behavior, often hiding in the sand to evade predators. Sand eels play a crucial role in the marine ecosystem, serving as a primary food source for various species, including seabirds and larger fish. These fish are characterized by their slender bodies and pointed snouts, which help them navigate through the sand. Sand eels are often caught for use as bait in fishing and are also important in commercial fisheries. Their populations can be affected by environmental changes and overfishing, making sustainable management essential.