Saltwater
saltwater
saltwater
No. None of the oceans are comprised of fresh water.
Fresh Water, If you can find a saltwater river I would be very suprised
Seaweed, by its very name, comes from the sea, and is thus saltwater.
sea sponges are found in mostly in salt water, but a few live in fresh water.
No, there is no sea that is half salt and half fresh water. Saltwater and freshwater have different densities, which prevents them from mixing evenly in large bodies of water. However, there are instances where saltwater and freshwater can meet, creating brackish water with varying degrees of salinity.
saltwater has salt in it, freshwater does not.
Saltwater, but it is much less salty than the open ocean at least on the surface.
no
A puddle can be either fresh water or salt water, depending upon the source of the water. Generally, in an environment other than one very near the sea, a puddle would be expected to be fresh water.
Some animals that live primarily in saltwater need fresh water because saltwater does not absorb the necessary impurities from their metabolic systems. Salmon and some species of eels spend part of their life cycle in fresh water (where they have to retain salt) and part in the sea (where they have to balance their body salt with the saltwater around them).