Trenches are the product of tectonic plates moving around. When tectonic plates meet one another and hit each other, something called subduction happens.(Britannica). Subduction is when the less dense plate slides beneath the more dense plate, creating a trench. The super deep trenches, like the Mariana Trench, are from when multiple tectonic plates converge. These trenches are incredibly deep, the Mariana Trench is almost seven miles! Because these trenches are so deep there is extremely high water pressure, freezing temperatures, and complete darkness.(Britannica). These alarming conditions make it extremely difficult for humans to explore the trench floor. It only adds to the mystery and allure when you realize that species live in these extraordinary harsh conditions. Small sea cucumbers called Holothurians, amphipods, and xenophyophores are the most common creatures, but since it’s so hard to explore there’s still tons of species we have not descovered yet.