As seen in the following video, courtesy of Sharks on NBCS, Roussel bit Vlasic's bare fist while officials attempted to break up a tussle between them:
Roussel and Vlasic were each given two-minute penalties for roughing on the play, while Roussel was given an additional two minutes for cross-checking and a 10-minute misconduct.
The 29-year-old Roussel is in the midst of his first season with the Canucks after he spent the first six years of his career with the Dallas Stars.
In 21 games this season, Roussel has three goals and five assists for eight points, as well as 65 penalty minutes.
Vlasic, 31, has spent his entire, 13-year career with the Sharks, and he has registered one goal and five assists for six points through 23 games this season.
The Sharks and Canucks aren't scheduled to meet again until Feb. 11.