All printables
Peanut worm — printable fact sheet
Free to print or save as PDF. Great for classrooms, homeschooling, and young explorers.
Creature Atlas
Animal Fact Sheet
Name: ____________________
Date: ____________________
Peanut worm
Sipunculus nudus
The peanut worm is a marine invertebrate named for its ability to contract its body into a shape resembling a peanut. Belonging to the phylum Sipuncula, it has an unsegmented, cylindrical body that can stretch and retract, with a retractable introvert used for feeding. Peanut wo…
Did you know?
- Peanut worms lack both a true circulatory and respiratory system, relying on diffusion through their body wall for gas exchange.
- Peanut worms can contract their bodies so tightly that they resemble a shelled peanut. Despite their simple appearance, they have a complex digestive system and can regenerate lost body parts. They are considered living fossils, having remained largely unchanged for over 400 million years.
What I learned
Draw the peanut worm
© Creature Atlas · www.creatureatlas.com · Free for classroom & personal use
Want the whole set?
Get printable fact-sheet packs, coloring pages, and classroom worksheet bundles for dozens of animals — ready to download and print.
Browse printable packsGet a free printable each week
Join the newsletter for a new Creature of the Week + printables.