This is a video documenting the relationship between a pearlfish and a sea cucumber's butthole. Apparently sea cucumbers are so disgusting that predators don't want to mess with them. The pearlfish though? They are good eats. The solution? Live in a sea cucumber's butthole where you're safe. Get settled, then invite your friends and family to join you. You might think I'm kidding but I'm not, and this is the video to prove it. No word what might be living in Bigfoot's butthole, but you have to admit that's a pretty amazing hiding spot. Same goes for the Loch Ness Monster's rectum.
Keep going for the video, but skip to 0:35 if you just want to see a sea cucumber pooping, and to 0:57 for a minute of a fish repeatedly swimming in and out of a sea cucumber's butt.
Thanks to Jeffrey S, who has never been more thankful for having a roof over his head instead of a butthole.