It's nearest living relatives are squid and octopus which, over evolutionary time, have both lost their shells and the octopus has become one of the nautilus' major predators.
نزديکترين خانواده ي زنده ي او ده پايان و اختاپوس است که هر دو بر اثر تکامل زماني صدف خود را از دست داده اند و اختاپوس يکي از بزرگترين شکارچيان حلزون شده است