tubeworm
/ˈtjuːbˌwɜːrm/
noun
- A type of marine worm that lives inside a long, thin tube made of sand, shell, or calcium carbonate.
- The tubeworm attaches its tube to rocks on the ocean floor.
- Divers spotted a colorful tubeworm near the coral reef.
- Some tubeworms can grow several feet long in deep-sea vents.