This video is cool on its own, but I thought I should include something else about blanket octopuses to make this post more interesting. So I did some googling, and discovered a claim that blanket octopuses are one of "the most extreme sexually dimorphic animals." This felt like a pretty ridiculous accolade, so naturally, I kept reading. Apparently, the blanket octopuses that are (assigned) female at birth can reach sizes of up to about two meters, or a little over six feet. By contrast, the (assigned) males tend to max out around … 2.4 centimeters.
Yes, you read that right. That's like me having sex with a walnut but also I'm a cephalopod.
Given that information, I feel pretty confident that octopus in the video above is a female.