| Characteristic Larva | Actinotroph |
| Unique feature | Lophophore |
| Tissue layers | Triploblastic |
| Developmental pattern | Protostome |
| Gut | Complete |
| Coelom | Coelomate |
Clue: We also have a ring of tentacles, but we end up living in holes in the mud.
Professor St. John's Instructional Materials
Sonoma State University
| Characteristic Larva | Actinotroph |
| Unique feature | Lophophore |
| Tissue layers | Triploblastic |
| Developmental pattern | Protostome |
| Gut | Complete |
| Coelom | Coelomate |
Clue: We also have a ring of tentacles, but we end up living in holes in the mud.