Both are gorgeous!
Blue for those who are making a quilt of 'any' fish in the river/lake/sea; orange for those who are envisioning koi in their pond.
Then again, I have made a quilt, shown on this board, that used a purple fabric with large fish on it as a background and no one has yet recognized it as fish, no matter where I've shown it!
Sometimes the print doesn't matter, the "movement" in it does.