Story: Marine animals without backbones

Peanut worm on a golf-ball sponge

Peanut worm on a golf-ball sponge

This red peanut worm (species unidentified) clings to the side of a sponge. Some peanut worms have the shape of unshelled peanuts, but this is not a defining characteristic. All possess an unsegmented body consisting of a forward section (called an introvert), which can be completely withdrawn into the back section of the animal. Peanut worms are mostly found in shallow waters. Some are mud dwellers, while others live in crevices or even bore into rocks.

Using this item

Ryan Photographic

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

All images & media in this story

How to cite this page:

Dennis Gordon and Maggy Wassilieff, 'Marine animals without backbones - Advanced worms', Te Ara - the Encyclopedia of New Zealand, (accessed 26 July 2024)

Story by Dennis Gordon and Maggy Wassilieff, published 12 Jun 2006