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Pinwheel
leathery soft coral
Lobophytum sp.*
Family Alcyoniidae
updated Nov 2019
Where
seen? This large disc-shaped leathery coral that resembles
a pinwheel is commonly seen on our Southern shores. On coral rubble.
Features: Colony 30-50cm or larger. The circular colony usually with a flat,
broad disk attached to a hard surface by a very short, very broad
central base that is usually the same diameter as the upper disk.
The base is often hidden by the disk.
On the upper surface, ridges radiate from the centre of the disk.
The ridges may have large flaps so that the ridge looks like half
of a lobed leaf. These ridges stick out of the disk and are not folds
of the disk itself. When out of water, the ridges or 'leafy' parts
are collapsed so that the entire colony sometimes looks like a pinwheel.
The leathery common tissue may be pink, orange, greenish, maroon or
brown.
The colony has both autozooids and siphonozooids. Autozooid polyps
have short bodies (about 1cm) which are usually of the same colour
as the common tissue. The autozooid polyps have 8 branched tentacles
that are white. The siphonozooids do not emerge from the body membrane
and function to pump water through the colony. These look like little
dots among the taller autozooid polyps. The autozooids can retract
completely into the common tissue. Out of water, the surface of the
common tissue has two different kinds of holes; bigger one where the
retracted autozooids are, and smaller ones where the siphonozooids
are. |
Pulau Hantu, Mar 05 |
Often resembles a pinwheel.
Terumbu Pempang Laut, Dec 18
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Upper
disk and base diameter
usually about the same diameter.
Sisters Island, Jul 04 |
Sentosa, Aug 05
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Sentosa, Aug 05
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Sentosa, Aug 05
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*Species are difficult
to positively identify without close examination.
On this website, they are grouped by external features for convenience
of display.
Pinwheel
leathery soft corals on Singapore shores |
Other sightings on Singapore shores |
Pulau Biola, Dec 09
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Pulau Pawai, Dec 09
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Terumbu Salu, Jan 10
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Terumbu Berkas, Jan 10
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Pulau Salu, Aug 10
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Pulau Berkas, May 10 |
Pulau Salu, Jun 10 |
Bleaching.
Pulau Berkas, May 10 |
Links
References
- Fabricius,
Katharina and Philip Alderslade, 2001. Soft
Corals and Sea Fans.
Australian Institute of Marine Science and the Museum and Art
Gallery of the Northern Territoriy. 264 pp
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