Geoduck, << GOO ee duhk, >> is the name of a group of large marine clams. The best-known kind, the Pacific geoduck, lives along the Pacific coast of North America. It can weigh as much as 10 pounds (4.5 kilograms), and its open-ended shell may reach 9 inches (23 centimeters) long. The clam’s habitat ranges from seacoasts to ocean depths of over 200 feet (61 meters). It lives in burrows that are sometimes over 3 feet (1 meter) deep. A geoduck feeds on tiny plantlike organisms called phytoplankton. It uses long, tubelike organs called siphons to draw in food and seawater. The animal’s large gills then act as a filter to trap the food.
