They are a beautiful fish, but they do get big. It will eventually out grow your 140g. I had a gray angelfish (basically the same fish) had lots of character, but would need a pretty big tank, so I had to get rid of him. Apparently like most angels, they don't grow as big in the wild, but grays/frenchs I hear easily get +15". LisaD, I hope you were on the east side of mexico scuba diving!