Because there is salt in sea water and salt makes you float better so is easier to swim.
You are more buoyant in salt water than in fresh water, so it takes less energy just to stay afloat, making it easier to swim.
It is easier to swim in the sea because of the amount of salt in sea water the density of the water is greater which make you float more easily.
It is easier to swim in the sea, as it is salt water as aoposed to fresh water sea water is also much saltier then water in a saltwater pool. that makes the sea water denser and the swimmer comparatively lighter.
Sea water is easier to float in, but wave make it harder to swim in.
it depend on the density of the water . fresh water is more dense than sea water. therefor human can float on sea water easier than fresh water. divers are good at water density.
Sea water contains lots of dissolved salts. Thus the density of the salty sea water is more than that of water in swimming pools, and the salty water lifts you more than fresh water, which make swimming easier.
Salt water is denser and, therefore, more buoyant than fresh water so less of your energy is expended keeping afloat, and more is used to propel you along. Phil
The higher the salinity of the water the easier it is to float - the Dead Sea, the Caspian Sea, the Great Salt Lake.
saltwater has salt in it, freshwater does not.
Salmon swim in the sea. Salmon are fish. Fish love water. The sea is water. Thus, salmon swim in the sea. Voila!
Of course. There are several species of sea going ducks including eiders and scoters. There would be no problem in a fresh water duck's swimming in salt water (in fact it's easier to float than in fresh water) but the salt water might eventually upset their metabolisms.
The density of sea water is greater the fresh water. The more greater density the larger is its upward thrust.