As a chef i have seen many changed names of fish, cod is usually hake or hoki. I dont change the name of fish but i started at a hotel on the south side of town and changed the nile perch that was being served as barra. I sent out real barra and was amazed at how many customers that had been eating there for years complaining "that it isn't barra, i know barra, i've been eating it here for 10 years." We didnt have the heart to tell them they had been getting ripped off but instead reassured them it said barra on the box.
I reckon you guys are funny complaining about basa and ordering the chinese bleached squid rings instead.