Wereshark

A half-man, half-shark creature, as adept a fighter in the water as it is on land.

The instant a rift opens in one corner of the arena, a Wereshark appears. He charges toward you at incredible speed, his jaws open wide. - Tome of Encounters (RPA-SQ1) 

• Punch the wereshark head-on:
  • You stun him and win the match.
  • You injure yourself in your attempt and the wereshark circles around for a second attack:
    • You get your bearings and finish off the wereshark.
    • He loses interest in you and tries to escape, then is contained by the guards.
• Dodge out of the way of its charge:
  • You succeed and the wereshark puts itself out of commission running into the arena wall.
  • He catches you and circles around for a second attack:
    • You get your bearings and finish off the wereshark.
    • He loses interest in you and tries to escape, then is contained by the guards.

Weresharks can be disoriented with a swift punch to the nose;

You hit the shark in the nose so hard that its jaw snaps shut. For a moment, he appears simply stunned. He shakes his head to the left and right as if attempting to shrug off the pain, then wanders around the arena in an apparent daze. - Tome of Encounters (RPA-SQ1)