Commercially-historically-harvested
Guides
Balanus nubilus
giant acorn barnacle
Balanus nubilus is the world's largest barnacle species, reaching up to 15 cm in diameter and 30 cm in height. It possesses the largest known muscle fibers of any barnacle, making it historically significant for muscle physiology research. This northeast Pacific species is a filter feeder that attaches to hard substrates including rocks, pier pilings, and other animals at depths up to 90 meters.