| Aspect: | Brown entanglement of loosely intertwined fibres reminiscent of a decaying rug. |
| Population: | Common. |
| Notable feature: | May sometimes be seen rolling on the sea bed, pushed by currents. |
| Environment: | Relatively shallow waters. |
| Behaviour: | . |
| Aspect: | Brown entanglement of loosely intertwined fibres reminiscent of a decaying rug. |
| Population: | Common. |
| Notable feature: | May sometimes be seen rolling on the sea bed, pushed by currents. |
| Environment: | Relatively shallow waters. |
| Behaviour: | . |