In order to make sea water usable it would need to be boiled. This would cause the salt to evaporate, so it could be consumed.
No because the salt water can take the pressure of the core under the earth, if there was a fresh water sea the water wouldn't be able to hold the pressure and instead of a sea it would be a gaping void in the earth.
You can raise a sea urchin in a salt-water aquarium. There are no fresh water sea urchins so you would need a salt-water aquarium to properly care for the urchin.
I would imagine that the sea water would have to run through a water purifier.
What?
In the sea, in lakes and in rivers. In all cases the plans would need to be in the photic zone.
Water is used for hydration mostly , and we all need water or we'll die.But it can be used to cook and to cleanse wounds.
No.
beacuse they get rusted in sea water
The North Sea, - and the Vikings crossed it often .
to live
the dead sea
"Mediterranean Sea" prevent polar water from entering this sea