It take me few minutes to find the name of this. Finally I found the name of it, it is called
Slipper lobster 琵琶虾
I cost me only 250 Baht / KG. If you take meal in any restaurant they will charge 500 Baht or more than that.
Some people search for:slipper lobster 琵琶蝦攋尿蝦Goole gavity