"Beneath the water people are who sigh"

(Canto 7, line 118)

These are the "sullen" rather than "angry" souls - Sapegno finds Dante's description of their sins here rather difficult to make sense of. Other commentators have pointed out that maybe the proud (among the fighting) and the envious (among the bubbling) are meant to be included among these souls punished in the fifth circle: in that way, all the seven cardinal sins would have been dealt with in the first few circles.