Used the following abilities (was killed FIRST of the 3 sharks)
Casts Shark King's Presence 10 seconds into fight and every 60 seconds thereafter
Casts Mutilate Every 30 seonds.
Casts Swallow every 50 seconds.
Part of the event "The Defeat of Prexus" (see this quest entry for the group version and this quest entry for the raid version).