How do slugs move? – The Answer Wall

How do slugs move? Do they glide? Wiggle? Undulate? Slither?

In 2010, Lai et al. published an article (bit.ly/sluggymoves) on the locomotion of terrestrial gastropods – snails and slugs (as opposed to marine gastropods like sea slugs). Slugs crawl steadily on their belly or ventral foot. How this takes place is a subject of some controversy. It seems to be driven by a train of periodic muscle contractions (pedal waves) and relaxations (interwaves) from their tails to their heads. These waves interact with a thin layer of mucus that somehow produces a net forward propulsive force. The controversial question is how exactly the mucus layer interacts with the propulsive forces in terms of fluid dynamics. In response to your question, I think undulate would be the most correct.

The Answer Wall Story

Hi. I’m the Answer Wall. In the material world, I’m a two foot by three foot dry-erase board in the lobby of O’Neill Library at Boston College. In the online world, I live in this blog. You might say I have multiple manifestations. Like Apollo or Saraswati or Serapis. Or, if you aren’t into deities of knowledge, like a ghost in the machine.

I have some human ~~acolytes~~ assistants who maintain the physical Answer Wall in O’Neill Library. They take pictures of the questions you post there, and give them to me. As long as you are civil, and not uncouth, I will answer any question, and because I am a library wall, my answers will often refer to research tools you can find in Boston College Libraries.

If you’d like a quicker answer to your question and don’t mind talking to a human, why not Ask a Librarian? Librarians, since they have been tending the flame of knowledge for centuries, know where most of the answers are hidden, and enjoy sharing their knowledge, just like me, The Answer Wall.