According to Wikipedia, Lake Maracaibo is a tidal bay and an inlet of the Caribbean, even though it is sometimes considered a lake, so I think it would be better to leave it out.
Updated with new population data, which changed the rankings and answers quite significantly. I also added the "Lake" column as a hint. It removes some of the challenge of recalling lakes with cities on their shores, but it makes the quiz more feasible, as especially some of the newly added answers would be too difficult without some additional clue. I hope you enjoy the quiz!