Plumularia setacea, the plumed hydroid or little sea bristle, is a colonial hydrozoan in the family Plumulariidae and is found worldwide.

[2] Plumed hydroids are creamy yellow to brown and have feathery stems.

The stems may grow to 2 cm in total height.

The reproductive bodies are smooth and oval.

This Leptothecata-related article is a stub.