The deep sea covers around 65% of the planet’s surface, making it the largest habitat on Earth. Yet, this vast area remains largely unknown. The remoteness of the deep sea, which lies below 200 m, makes traditional ecological data collection methods extremely difficult. As a result, very little is known about the lives of deep sea creatures. In my latest PLOS Ecology post, I talked with two scientists about their recent review of all the population genetics studies of deep sea invertebrates published to date. Their results highlight the disparity between our limited knowledge of deep sea ecology and the growing impact of humans on this habitat. Read the post at the PLOS Ecology Blog: Life in the Deep Sea is Mostly Mysterious .