Identification:
- Shell Morphology: Fan-shaped to triangular, broad, reaching up to 40 cm in length and 20 cm or more in width, with a rounded lower margin. Both shell valves bulge outwards from the margin towards the center. The shell surface is smooth or exhibits concentric ridges and radiating scale-like markings. A large muscle scar is present inside the shell, running along the posterior margin. The shell color is typically reddish-brown or dark brown.
Biology and Ecology:
- Feeding: Feeds on both planktonic animals and plants.
- Habitat: Commonly found in coral reefs or on clean sandy bottoms.
- Depth Range: Distributed from the intertidal zone to a depth of 20 meters.
Distribution:
- Vietnam: Bach Long Vy, Cat Ba, Ha Mai, Co To, Thanh Lan, Con Dao, Cu Lao Cham.
- Global: Indian Ocean, Pacific Ocean.
Value:
- Scientific and Aesthetic: Possesses scientific and aesthetic value. This is a distinctive bivalve species in Vietnam’s marine environment. Considering the introduction of specimens to saltwater parks for educational purposes to help students research the species’ ecology and behavior.
- Culinary: The meat is delicious and is considered a premium seafood product.
Conservation Status:
- Threats: This species is valued for food and crafts, and is thus heavily exploited, leading to a decline in numbers.
- IUCN Status: EN A1a,c.
Conservation Measures:
- Implement controlled harvesting and protect coral reefs where the species resides.