It really depends on what kind of a swimmer you are. If you can swim really well, you can probably swim really far. If you can't swim at all, you won't swim very far. I hope this answers your question.
As far as a blue whale can swim in a year
they swim as long as they can
why do ducks swim together in lines
a pigeon cannot swim very far it can swim approximately 20m for approximately 30 seconds (I think) :)
they swim deeply and far away.
not far from its normal habitat
as far as a elephant can run
A swimmer must swim 75m.
it depends on how far he/she is
750 metres
a mile
5 ft