England
First of all, height is a huge advantage in swimming, and these countries generally have taller people. Also, swimming is more of a minority sport in other countries, but swimming is a growing sport in these two countries that have become a main part of these countries' summer Olympics.
In a swimming pool
Alot Tennis, Swimming, Curling, Football ( soccer in a few countries ), Rugby, Skiing and more..
204
Australia, USA, Germany, Hungary and Netherlands are the historically the main powerhouses or swimming. There are several other countries that are emerging.
According to most websites, Australia and America are the best countries in swimming.
all of the countries that were in Beijing i guess,
675
Swimming can't not be played foll it a toucher sport as its very hard to breath
There were 19 NOC that medaled in swimming events. 166 of the 204 NOCs had athletes in the 34 swimming events see related link
There are a couple of sports that are played individually. Their is Golf, Swimming, Tennis, and Skiing.
Yes. Aquatic sports include: Marathon Swimming, Synchronized Swimming, Diving and Water Polo as well.