Freshwater turtles cannot survive in the sea, no.
Sea mammals cannot survive without fresh water, but they do not have to drink fresh water in order to obtain it. They get much of their water through the food they eat and through their own bodies which remove the salts from sea water and the water in their food.
They live in water--as they're a type of fish--so they need as much water as an aquarium or an ocean can hold. The type of water for them is sea salt water, not fresh water.
guinea pigs need both light and water to drink, to survive!!1
Orca are sea animals and survive in water -- anywhere they in the world.
Sea pigs live in oceans.
They have to live in water to breath in.
it matters what you mean by survive... it feeds by filter feeding.
They are so well adapted to the water that they can't survive without it.
Sea water with some bacteria in it. (That's what they eat.)
Some fishes needs Sea Water to survive, that can be one possible way that it is useful.
Some fishes needs Sea Water to survive, that can be one possible way that it is useful.