(General)
Your skill with your chosen weapons is so great that you can use them underwater without impediment.
Prerequisites
Weapon Focus, base attack bonus +1.
Benefit
You don't take additional penalties on attack and damage rolls for fighting underwater with bludgeoning and slashing melee weapons for which you have taken the
Weapon Focus feat.
Normal
When using bludgeoning and slashing melee weapons underwater, you take a -2 penalty on attack rolls and deal half damage.