Yes, they can swim. Though I am not sure how often they do it, I did see one swim with it's body under the water surface. This is unlike a Cottonmouth that swims above the water surface.
The cast of How to Swim from Cuba to Florida - 2014 includes: Diana Nyad as herself
How to Swim from Cuba to Florida - 2014 was released on: USA: 19 February 2014 (internet)
Sure
Anhinga
yes you can
Because you might get stuck under it and drown
give her money to pay for it
you can only swim above water
ducks have to swim under water to get food because they will have no food if they dont go under water and they need water also.
swim.
No.