Here goes... "Nautiluses represent a unique lineage of marine organisms that extends back over 500 millions. While cosmopolitan in the past, today they inhabit coral reef slopes throughout the Indo-Pacific to depths of 800 meters. For decades, nautiluses have been been fished for their ornamental shell with no regulation or management plans in place, resulting in significant population declines and local extinction. In 2017, the first international regulatory measures were put in place through the Convention on International Trade in Endangered Species (CITES) to protect nautiluses from overexploitation. The current methods used to survey nautilus populations include baited traps, baited remote underwater video systems, ultrasonic transmitters, demographic data, as well as phylogenetic and isotopic analyses. These studies not only provide data on nautiluses, but also the larger habitat and ecosystem as a whole."