The 27 Best Deep-Sea Species: #26 Pig Butt Worm

Pig Butt Worm, Chaetopterus pugaporcinus

This species bring a whole new meaning to butt face. It’s Latin name even means butt face.  I jest… it actually means resembling a pig’s rump. Chaetopterus is a polychaete and like other worms it has segments.  Some of the segments are just a little bit inflated.  But it’s not just it’s looks that puts this little fellow on our list.  It feeds by deploying a mucus cloud that traps material in the water.  Shaped like a butt and uses a mucus cloud to feed…enough said.



Dr. M (1801 Posts)

Craig McClain is the Executive Director of the Lousiana University Marine Consortium. He has conducted deep-sea research for 20 years and published over 50 papers in the area. He has participated in and led dozens of oceanographic expeditions taken him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses on how energy drives the biology of marine invertebrates from individuals to ecosystems, specifically, seeking to uncover how organisms are adapted to different levels of carbon availability, i.e. food, and how this determines the kinds and number of species in different parts of the oceans. Additionally, Craig is obsessed with the size of things. Sometimes this translated into actually scientific research. Craig’s research has been featured on National Public Radio, Discovery Channel, Fox News, National Geographic and ABC News. In addition to his scientific research, Craig also advocates the need for scientists to connect with the public and is the founder and chief editor of the acclaimed Deep-Sea News (, a popular ocean-themed blog that has won numerous awards. His writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.

14 Replies to “The 27 Best Deep-Sea Species: #26 Pig Butt Worm”

  1. Ah, such diversity in naming conventions. Makes me wistful for my days doing real science . . . . . but why a pig butt? Could DSN have this creature as the first installment of a “Really creative sea creature renaming contest?”

  2. LOL! Best – or worst – critter name ever. Or maybe both. :-D

  3. This has to be the coolest creature on the face of the earth! The Pig Butt Worm! Awesome! Love it! And here I thought the Sea Cucumber was funky lookin. *lmao*

  4. Thank you. That is the best laugh I have had for a while. You have got to love nature.

  5. An inelegant name…perhaps popular culture is “dumbing down” a generation of biologists.

  6. Ha! Taxonomists have giving “inelegant” names to organisms since classification was founded. Linneaus himself would name the most ugly animals after people he disliked. I recommend taking a perusal through the Curiosities of Biological Nomenclature. Dumbing down and having sense of humor are entirely different magisteria here.

  7. woowwwww. i wonder waht kind of names they will have for other sae creatures in the future. pig butt worm?? they really went deep this time.. lol

  8. Still makes me giggle. “Inelegant name?” This thing does not even need a name to make me giggle.

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