Aspect: |
Clumps of white, irregular calcareous tubes from which protrude the tiny worms' translucent radioles.
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Population: |
Occasional.
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Notable feature: |
Can form an entangled encrusting mass or, as seen in one of the picture below, colonise encrusting sponges.
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Environment: |
Often anchor on mooring shipwreck ropes as seen here, but also colonise sponges and even scraggly black corals as exemplified by two of the pictures below.
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Behaviour: |
Wary, and abruptly retract into their tubes if approached too closely. |