jobo
Grandmaster
depends how far the shore is, the most efficient stroke is possibly back stroke,as it takes by far the least effort, then breast stroke, freestyle/ crawl is ussualy the fastest but it consumes a lot of energy, butterfly is just people showing offYeah or obviously self defence if you fall out of a boat or something. At which point even amazing breast stroke guy would probably do freestyle as well.
if the shore or boat is a dot in the distance im breast stroking my way out, with some backstroke if i need a rest, if im being chased by a croc im going for crawl