Aquagirl Aquaboy (Fallout: The Roleplaying Game)

Aquaboy/Aquagirl is a perk in Fallout 2d20.

Effects
With rank one of this perk, the player takes no radiation damage from swimming in irradiated water, and can hold their breath for twice as long as normal. However, it increases level requirement by 3.

With rank two, whenever the player is submerged underwater, it adds +2 to the difficulty of opponent's tests when they attempt to detect the player.