Im not saying they won't go on land, but do they absolutely need it in order to live? No. Will they die without land? No. In the wild sure they are both terrestrial and aquatic. But that does not mean that they will die if they don't have access to land, that is for sure. Oh and my newts are comfortable enough to be breeding machines in nothing but a full 10 gallon full of water. Now if they were being tortured then they surely would not breed!