Anadara tuberculosa is a species of marine bivalve mollusk in the family Arcidae, commonly known as the mangrove cockle or black ark clam. It is native to the eastern Pacific coasts of Central and South America, where it inhabits intertidal mangrove ecosystems from Mexico to Peru. The genus name Anadara derives from Greek roots referring to its ark-like shell form, while the species epithet tuberculosa comes from Latin meaning “covered with small swellings or nodules,” describing the rough, ribbed texture of its shell. This species is closely associated with muddy, low-oxygen environments within mangrove forests, where it burrows into sediment and tolerates fluctuating salinity.

Anadara tuberculosa has a thick, oval shell with pronounced radial ribs and a dark exterior, while the interior is typically lighter. Like other ark clams, it possesses hemoglobin in its blood, allowing it to survive in oxygen-poor conditions and giving its tissues a characteristic reddish coloration. It is a filter feeder, consuming suspended organic particles, microalgae, and detritus from the surrounding water. The species plays an ecological role in nutrient cycling within mangrove habitats and contributes to sediment stabilization.

As a food source, Anadara tuberculosa is highly valued in coastal cuisines of Ecuador, Colombia, and other parts of Latin America. It is commonly consumed raw in dishes such as ceviche, where its distinctive briny, slightly metallic flavor is complemented by citrus and spices, or it may be lightly cooked in soups, stews, and rice dishes. The edible portion consists of the soft tissues inside the shell, which are rich in protein and have a firm, slightly chewy texture.

Nutritionally, the mangrove cockle provides high-quality protein, iron, zinc, and vitamin B12, reflecting its hemoglobin-rich physiology. It also contains omega-3 fatty acids and trace minerals derived from its marine environment. Bioactive compounds include heme-associated iron complexes and peptides that may have antioxidant or nutritional roles. However, because it is often consumed raw and harvested from estuarine environments, there is a potential risk of contamination with pathogens or environmental toxins if not properly handled.