Barbed Venomous Flipper Things

You can swim significantly faster than a normal
person, as though you were wearing modern
Scuba fins.
Whenever you attempt to brace, block, or deflect
a blow made by an opponent with their body
(e.g. a punch), the person attacking you must roll
SWOLE. If the result of their roll is less than a
partial success, they take damage at the beginning
of their next turn.