What does the phrase swim swim swim fishy in the barrel don't swim far mean?

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...

It is a combination of the chlorine often used to sanitize the water and the sunlight.

If you are on a swim team you could wear a skirted suit as a drag suit, that way you shave even more time at meets... If you just mean in a local pool or in your back yard, of course. The only thing...

Though its primary purpose is to stop water from going into a swimmer's ears, (and keeps hair fairly dry), it can help a swimmer to move faster. The cap has a tiny bit less friction with the water...

Well technically they can't swim, but they can float on top of the water, so it depends if you count that swimming or not.