Two seasoned divers just got the sight of a lifetime when they spotted the so-called feather boa of the sea, according to the Washington Post.
The giant tube-like creature looks like a huge hollow worm, but it's not that at all.
It's actually called a pyrosome, and it's made up of a ton of tiny animals.
Most recently one was found by New Zealand divers Steve Hathaway and Andrew Buttle. The Washington Post reported the duo was filming underwater for a video about White Island in New Zealand.
That's when they came across the 26-foot-long pyrosome that feels like a fuzzy feather boa.
You can see its fluffy texture up close here.
"I've always wanted to see one," Hathaway said, per the Washington Post. "I was beyond excited. This is like finding something that you've dreamed of for so many years."
Even though he's been diving for over a decade, pyrosomes can be rare creatures to find. So Hathaway was lucky to be in the right place at the right time.
And despite their large size, they don't pose a threat to humans. LiveScience says they just float around and eat krill. They're also bioluminescent — so they give off an eerie glow.
Perhaps the most fun fact about these organisms, though, is that they're technically immortal.
As Azula previously reported, the individual zooids that make up the pyrosome can clone themselves to replace injured or damaged members. So, the pyrosome could theoretically live on forever as long as the zooids keep replicating themselves.
Watch a pyrosome in action in the cool video below:
Unidentified Glowing Object: Nature's Weirdest Events - Series 3 Episode 2 - BBC Two www.youtube.com