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Omelette
leathery soft coral
Sarcophyton sp.*
Family Alcyoniidae
updated
Nov 2019
Where
seen? This large disk-shaped leathery soft coral that resembles
a fried egg is commonly seen on our Southern shores. On coral rubble.
Features: Colony 30-50cm or larger. The colony is usually mushroom-shaped;
with a flat, broad disk attached to a hard surface by a short stalk.
The diameter of the disk is usually wider than that of the stalk.
Polyps only found on the upperside of the broad disk. The edge of
the disk may be highly ruffled, especially when submerged. There are
no ridges or finger-like structures sticking out of the disk. When
out of water, the colony often flops over into a flat disk that looks
like a rather badly fried egg! The colony can also contract forming
puckered looking balls. The common tissue may be pink, yellow, orange,
greenish or brown.
The colony has both autozooids and siphonozooids. Autozooid polyps
have long slender body columns (1-2cm) with 8 branched tentacles that
are usually white. The siphonozooids do not emerge from the body membrane
and function to pump water through the colony. These are small, numerous
and look like little dots, densely arranged among the taller autozooid
polyps. The tall autozooids can retract completely into the common
tissue. Out of water, the surface of the common tissue has two different
kinds of holes; bigger ones where the retracted autozooids are, and
smaller ones where the siphonozooids are.
'Melting' omelette: During mass coral bleaching, this leathery soft coral not only bleaches but is sometimes also seen to 'melt'. Large holes form in the common tissue so the colony resembles melting cheese. Eventually, the result is that the colony divides into several smaller blobs. Perhaps one way of ensuring at least one of the blobs survives the bleaching event?
Sometimes, tiny ctenophores may be seen on large colonies, so well camouflaged that they are often
found by the long fine strings that they produce. |
St. John's Island, Aug 05 |
Pulau Semakau, Aug 11 |
Cyrene Reef, Jun 12 |
Colony
usually mushroom shaped.
Terumbu Pempang Laut, Aug 10
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Bleaching and 'melting' colony during mass coral bleaching.
Terumbu Pempang Tengah, Jul 16
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*ID needs to be
confirmed. Species are difficult to positively identify without close
examination.
On this website, they are grouped by external features for convenience
of display
Omelette
leathery soft corals on Singapore shores |
Other sightings on Singapore shores |
Tanah Merah, May 14
Photo shared by Loh Kok Sheng on flickr. |
Tanah Merah Ferry Terminal, Jun 22
Photo shared by Loh Kok Sheng on facebook.
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Terumbu Berkas, Jan 10
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Pulau Pawai, Dec 09
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Pulau Senang, Aug 10
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Pulau Senang, Jun 10
Bleaching. |
Pulau Salu, Aug 10
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Pulau Sudong, Dec 09 |
Terumbu Salu, Jan 10 |
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Sarcophyton
species recorded for Singapore
from
Y. Benayahu and L. M. Chou, 28 Feb 2010. On some Octocorallia (Cnidaria:
Anthozoa: Alcyonacea) from Singapore.
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Sarcophyton
crassocaule
Sarcophyton ehrenbergi
Sarcophyton glaucum
Sarcophyton tenuispiculatum
Sarcophyton teocheliophorum |
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Links
References
- Y. Benayahu
and L. M. Chou, 28 Feb 2010. On
some Octocorallia (Cnidaria: Anthozoa: Alcyonacea) from Singapore,
with a description of a new Cladiella species. The Raffles
Bulletin of Zoology 58(1) Pp. 1-13.
- 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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