Hismosa is right, both the grouper and the yellowtail are not finesse fish. I use a 5/0 Gamakatsu J-hook almost always, both fish gulp the bait down in one bite and neither has teeth that can cut the line so the circle design isn't needed.
If you use heavy line, when they take you into the rocks you DON'T have to try to tug them out. Just take the pressure off of the line as soon as you know that he has dived into the rocks, and count to fifty. Most of the time the fish will have relaxed and swam out of the rocks and you can resume the fight. Pull hard! The heavy line will not break when rubbing against the rocks. The local pangeros use at least 80#.