Hua Jia is Hua Jia, because Cantonese Hua Jia is homophonic with Hua Jia, Hua Jia is written as Hua Jia. Clam, called mango snail in Hainan, is a mollusk, about 3 cm long, with an oval shell, light brown and purple edge. Living on the shallow sea floor. Shells are slender and oval.

Small in size, the shell surface is yellow-brown, and the dark lines on the shell surface are similar to the text but have a concave-convex feeling. The color is dark, the pattern becomes larger, and there are spots or patterns composed of black, brown, dark brown, dense color or reddish brown. ?

Clam, also known as flower bug in Chaoshan, is a breeding variety developed in Chaoshan area in recent ten years. Its scientific name is Ruditapes variegata, its shell is nearly ovoid, its front end is pointed oval, its back end is blunt oval, its shell surface is dark yellow brown, covered with herringbone or flametongue-shaped dark brown patterns, and its shell surface has fine radial ribs from the top of the shell to the belly edge. The shell is milky white. Generally, the shell is more than 2 cm high and nearly 4 cm wide.

Born in shallow water several meters below the intertidal zone. The sediment seabed is the most. It is distributed along the coast. It can be caught in all seasons and is one of the most commonly used seafood for residents. Habitat in sandy or muddy intertidal zone and shallow sea, especially in estuary waters. Digging sand and mud with axe feet, burying in beaches and camp bottoms. Guangdong and Fujian have their distribution along the coast. Its breeding period is from 10 to 1 1 month every year.