Free style, i think.
The breast stroke
crawl
they swim by moving there tail side to side, to help them swim
There are four strokes; Breast stroke, Butterfly, Freestyle and Back Stroke
The oldest is believed to be the breaststroke.
Breaststroke Breaststroke
i think they swim butterfly, since they move in a wave-like motion.
Be a druid. Swim like a seal.
The breast stroke is a healthy active swim and is a good all round swimming stroke. It is very excellent exercise.
Momentary rest period for the swimmer.
Freestyle breastroke backstroke and butterfly
Yes. platypuses swim on their front. They do not swim on their side or their back, but they make hundreds of dives each day, and swim forwards on their abdomen.