Geoduck (Panopea abrupta) is a commercial name, and its species name is Elegant Poseidon Clam. It is also commonly known as emperor clam, pipe clam, etc. Geoduck is known vividly for its large and fleshy red tube. Called "Geoduck." It belongs to the phylum Mollusca, the class Bivalvia, the order Amaranthus, the family Tritonidae, and the genus Poseidon. It is a large shellfish of the genus Clams. Geoducks are native to the North Pacific coast of the United States and Canada. They have the advantages of large size, fast growth, delicious taste, and high economic value. At present, the annual production volume in the United States and Canada is 2,000-3,000 tons, mainly sold to Southeast Asia, with annual revenue of 300-400 million US dollars. Among them, 1,000-1,200 tons are sold to China every year, with a value of 100-150 million US dollars.

Geoduck is a buried shellfish. The water temperature in the living sea area is 3-23℃ (after 3 years of domestication, it can currently adapt to water temperatures of 0-25℃. When the water temperature is lower than 25℃ (Guangdong can carry out off-season breeding in winter and the following spring), the salinity is 27‰-32‰, the habitat substrate is mainly sand and mud, the water depth is 3-18 meters, the burial depth is related to the individual size, generally 50- 80 meters. Geoduck seedlings have a strong ability to burrow into sand when their shells are 5-10 centimeters long. Generally, it only takes 5 minutes to burrow in. If their shells are over 15 centimeters long, they lose their ability to crawl and burrow into sand. They will live in caves throughout their lives and will no longer move. Geoducks grow rapidly in the first four years. The first-instar shell is 5-6 cm long and weighs 36-40 grams; the second-instar shell is 8-10 cm long and weighs 200-250 g; the third-instar shell is 10-12 cm long and weighs 200-250 g. 400-500 grams; 4-year-old shells are 12-15 cm long and weigh 500-800 grams. As age increases, shell growth gradually slows down, but soft body growth continues, and the lifespan can reach more than 100 years. The meat yield rate of geoduck is high, reaching 60% -70%. The main edible part is the aqueduct muscle, accounting for 30% -35% of the total consumption. It contains 81 kcal of calories, 14.4 grams of protein, and 1.3 fat per 100 grams. grams, with high nutritional value.

Geoducks are dioecious. The annual breeding season is generally from April to July, and the peak period is from May to June. The number of eggs laid by an individual reaches 10-20 million, and the egg-laying water temperature is 14-17 ℃. The egg diameter is 82 microns. The fertilized eggs develop into D-shaped larvae (1 20-130 microns) in 4-5 days; they develop into shell-top larvae (1 60-180 microns) in 10-12 days; the larvae sink in about 30 days , with metamorphosis, the shell becomes 350-400 microns long. Geoducks feed on single-cell algae in seawater and can also filter-feed sediment and organic debris. The main enemies of geoduck are crabs, starfish, snails, plaice and other fish. Adult shells live on the seabed and have strong protective capabilities.