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Oxygen is more soluble in fresh water than it is in sea water, therefore there is more dissolved oxygen in river water than sea water.
As there is oxygen in water (H2o o=oxygen) , if there is water there is oxygen, so yes.
Sea water is surprisingly low in oxygen content, when a ship cruises through the water a lot of oxygen is introduced into the normally low environment and what you are seeing is the difference between the two.
Underwater, animals have special adaptations to extract oxygen from sea water. Fish, for example, use their gills to convert water into usable oxygen.
The Dead Sea.
Definitely not. The fish in the sea take in the dissolved oxygen in the sea thru their gills.
It depends! On what you say? Well, as an example it depends on the temperature of the sea water. The colder the water the greater the amount of DO can be contained. It depends on where the sea water is located; e.g., sea water at the mouth of the Amazon River (or at the mouth of most any river emptying into the oceans) for the fresh water from the river dilutes the salt content of the sea water there.
It is a mixture of water, salts and oxygen.
A person will actually float in sea water, even more easily than in fresh water because of the sea's salt content.
There is no "Death Sea." It is called the Dead Sea and it is called that because of salt content. Allegedly the salt content in the water is so high that nothing can live in it
The higher the salt content of seawater, the more buoyant the water is. And the Dead Sea has the highest salt content of any body of water in the world.
Oxygen is typically carried by the red blood cells of most animals. However, the Sea Star has no "blood" and instead uses sea water to transport its nutrients. Salt water transports the oxygen around a sea star's body.