It’d ridiculous, as Rav Moshe had stated, to reaffirm what had already been established as mutar in the shulchan aruch. So as was mentioned earlier, if a Rav or Posek or kashrus agency does not explicably assir the fish, then ipso facto, they hold the kashrus status to continue.
It’s far easier for you to list the names of all the American Rabbonim who have stated that the fish is assur; all the rest are matir.