| Answer | Crossword Clue |
|---|---|
| serpulids | SERPULID, a marine worm that lives in a stony tube |
| serpulid | a marine worm that lives in a stony tube |
| tubeworm | a marine worm that builds and lives in a tube |
| tubeworms | TUBEWORM, a marine worm that builds and lives in a tube |
| tubeworms | a worm that lives in a tube as |
