ZD: FRom the crc website
Swordfish (Xiphias gladius) does not seem to have scales when one looks at a sample. Some say that it has scales that are embedded to such an extent that it is impossible to remove them without making a hole. Others say that it has kosher scales on parts of its body which fall off during its development. Still others claim that it may have some kosher scales even at the time of harvest.
The Orthodox Union traditionally treats swordfish as non-kosher. (See Sh’ailos and Teshuvos Tzitz Eliezer 9:40 who discusses a statement made by the Knesses HaGedolah about “cherev hadag” and explains why we cannot use the statement to permit swordfish.)
If R’ Schechter as you assert says it is kosher why then does the OU treat it as non kosher?