Invasive Species
There are no invasive species in the Mariana Trench. As a result of the extreme temperature (cold) and pressure that is found in the Mariana Trench, only special organisms can survive there. If an organism that normally lives closer to the surface of the water tried to come to the Mariana Trench they would die due to the extreme conditions. Organisms that live in the trench are specially adapted so that they are sounded by fatty membranes that can stay in a liquid from in very low temperatures. If normal organisms were to go into this kind of temperature their fat would solidify like butter. Proteins have a hard time changing their shape in the Mariana Trench due to high pressure. Proteins break down food for energy, so of course they are vital. Organisms native to the Mariana Trench have more piezolytes in their cells than organism who are native to higher parts of the ocean. Piezollytes help reduce the water forcing on the proteins. This gives them more space to do their work, preventing them from being distorted. The requirements for living in the Mariana Trench are so extreme compared to other biomes that it is not usually possible for other organisms to automatically be able to live there. The extreme conditions found in the trench result in there being no invasive species.