
| Characteristic Larva | n/a |
| Unique feature | Ecdysis |
| Tissue layers | Triploblastic |
| Developmental pattern | Protostome |
| Gut | Complete |
| Coelom | Pseudocoelomate |

Clue: We are small, slender worms who can range in size from microscopic to more than 3 feet long! Many of us are parasites.