Where are tuna fish found in the ocean?

Many freshwater animals cannot live for long in sea water and vice-versa mainly because of the

Many freshwater fishes cannot live in seawater and vice versa because of:

Animals which live at the bottom of the sea are known as:

The moving away of an organism temporarily from the stressful habitat to a more hospitable area and return when stressful period is over is called . . . . . . .

Which of the following pairs is $NOT$ correctly matched?