| Aspect: | Red-orange fluffy mass of small branches carrying feathery branchlets (hence scientific designation, penicillus meaning brush in Latin). |
| Spread: | Not widespread, without being rare. |
| Notable feature: | Close-up view reveals the presence of small iridescent pinhead-sized balls on branches and their feather-like growths. |
| Environment: | Rock subtrate in relatively sheltered waters, to a depth of around 15 metres. |