Pterobranch Worm Rhabdopleura compacta
Like the acorn worms to which they are related (see Acorn Worm), pterobranch worms live in a thin tube and their bodies are divided into a proboscis, collar, and trunk. They also have a pair of arms covered in tentacles arising from the collar region. The tubes of many individuals are connected together with strands of soft tissue that join the trunks of the animals, enabling them to form a colony.
- Phylum Pterobranchia
- Length Up to in (5 mm)
- Depth Not recorded
- Habitat Attached to sessile animals
- Distribution Cold waters of northern hemisphere