Achange of dna in an organism that results in a new trait is known as a

A change in dna (deoxyribonucleic acid) in an organism that results in a new trait is known as a mutation. A mutation usually takes many generations to be visible, it is passed through the next generation and they inherit the same DNA and they might be a small change in that same DNA and then that genetic information is passed to the next generation and so on, after being passed and altered for a long time the results will be visible.

The zone your looking for is the intertidal zone.