Strictly speaking, it is a mussel, not a clam in the sea. Most people live in the sand or purple mud in the river. I remember that I used to play in the water, and I could feel it when I stepped on it, and I went straight into the river. The biggest I have ever seen is as big as a ladle. It and a kind of fish called pomfret are good partners, helping each other with their children. This kind of fish is called Gourd Fish in Heilongjiang and HongLing Fish in Jilin. In fact, this fish is as confused as this mussel. You must check the eggs of HongLing alone. Who knew it was a ray? This kind of pomfret is close relative to China pomfret and high pomfret, and it is also very beautiful.