Aquatic Superiority (V7)

A Monster (V7) Trait.
From the Book of Engoku (V7):

Description

This Trait allows an Aquatic (V7) creature to use spells, throwing weapons or projectiles (V7) in the Water (V7), if such are available to the Monster. Additionally, those with this Trait are immune to most underwater Terrain Effects (V7) (like Seaweed) unless the Reeve (V7) decides otherwise

Monsters who swim better than you (partial list)

• Aquatic Elf (V7)
• Merfolk (V7)
• Mo'Kathah (V7)
• RyuSui (V7)
• Shachihoko (V7)