I love to swim
wow, i love swimming too, swimming is usually done for recreation, sport exercise or survival 
I like swimming as a sport and recreation.
wow, i prefer swimming in a swimming pool for recreation
lol. Have you tried swimming in a river?
yes, of course i have, what about you?
Yes. I also went down in a ocean shelf 
really, i heard about the  Pacific Ocean Shelf Tracking project, it seems you are part of it