"Strike to Subdue or Keep Rowing! I got them!"Thickness lets his shield clatter against the bottom of the boat, pushing through to the other side and diving into the water to give chase. While he lashes out, it's no to kill but to disorient, head snapping forward but jaws not biting, while he grips his lance loosely underwater.


Spoiler: Action!
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Move: Jump into the water on the side of the boat with the creature. No penalty for moving through allied spaces, but I almost certainly provoke a AOO.
Swift: Arcane Strike, because I have nothing better to do.
Standard: Non-lethal bite attack.

Hit: (1d20+3)[5] -4 for Non-Lethal.
Damage: (1d6+6)[9], +1 for Arcane Strike, Nonlethal.

If/Thens:
If Attacked I'll use Whirlpool Spin.
If the enemy attempts to leave in a manner that provokes AOO, I'll attempt a Hamstring Manuever from the Elephant in the Room Feat reduction, being a opposed combat manuever with attacks to entangle them/prevent them from leaving instead of doing damage.