The commonly known example is the penguin. It has a suborbital gland that converts sodium chloride out of the bloodstream where it's excreted as a brine on the bill. Penguins don't actually drink salt water, but they ingest it while swallowing prey.
probally fresh because no salt in mouth or eyes addition: it is easier to float/swim in seawater since seawater is denser than fresh water.
by evaporation
No, it is seawater.
the seawater smells
clean fresh water should be used strate away to prevent infections
When a ship sails from seawater to fresh water, the buoyancy of the ship increases because fresh water is less dense than seawater. This can cause the ship to ride higher in the water. Additionally, there may be a slight increase in the ship's speed due to the lower density of the fresh water offering less resistance to the hull.
no.they must have fresh water to live.
When fresh water meets seawater, it is called a "brackish water" environment. This occurs in estuaries or coastal wetlands where rivers flow into the ocean.
Freezing desalination works by freezing seawater and separating the ice crystals from the remaining saltwater. The ice crystals are then melted to produce fresh water, while the saltwater is left behind. This process helps remove salt and impurities from seawater, resulting in fresh water that is safe for consumption.
Seawater has a higher salinity level due to dissolved salts, whereas fresh water has a very low salinity level. Seawater is found in oceans and contains various minerals, while fresh water is found in rivers, lakes, and underground reservoirs. Seawater is not suitable for drinking or agriculture without desalination, while fresh water is typically safe for consumption and irrigation needs.
Answer 1) At the Surface. Answer 2) I disagree with the above answer. For practical purposes water is not compressible. Therefore the density is the same all over. The difference in density at the surface and at the bottom is so small that it is negligible. However, fresh water is less dense than seawater, since the salts dissolved in the seawater makes it more dense. For that reason, if you consider seawater near the mouth of a river, that water will be less dense than the seawater in general.
You've already answered your own question. The difference is that feshwater lochs contain fresh water while seawater lochs contain seawater.