I like to make my own Tom Yum soup sometimes as we can get Tom Yum Paste virtually in every oriental stores these days. Tom Yum Gong is for tom yam soup with shrimps only. But there are a lot of variety these days, you can have seafood tom yum where fish, shrimps and cutterfish would be added. Or you can have fish tom yum, even crabs tom yum would be delicious.