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Tongue
mushroom hard coral
Herpolitha limax*
Family Fungiidae
updated
Oct 11
Where
seen? This long, often tongue-shaped mushroom hard coral
is sometimes seen on many of our Southern shores. This coral is free-living
as an adult (it is not attached to the surface) and large ones may
be seen on in coral rubble and among living corals.
Features: Skeleton longer than
broad, 20-30cm long with rounded ends, though some may have rather
pointed ends. Comes in a wide variety of shapes from long and narrow,
oval to circular, flat or rather humped, also bomerang shaped. Specimens
in T-, Y- or X- shapes are also seen. This is generally due to regeneration
following damage.
A prominent central furrow. Upper surface with thin lines radiating
from the central furrow. Lines are parallel, discontinuous with sparse,
fine 'teeth' that usually can't be seen in the field. The underside
usually concave, some with radiating lines of short bumps.
Veron considers it to be a colonial animal with many mouths. Numerous
mouths are found in the central furrow and mouths may also be found
elsewhere on the upper surface. The sparse 'tentacles' are short,
slender and usually transparent, often white-tipped. These are not
true tentacles but inflated portions of the tissues. These are only
'extended' at night. Colours seen include light blue, green and purple..
Sometimes confused with other
long mushroom corals. Here's more on how to tell
apart elongated mushroom hard corals.
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Pulau Hantu, Feb 08

Tiny tentacles
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Underside
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Many mouths
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Kusu Island, Jun 04
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Thin overlapping discontinuous walls.
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Tiny tentacles
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Tongue
mushroom hard corals on Singapore shores
Pulau Hantu,
Apr 06
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A twisted colony.
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The other side of the twisted colony,
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Pulau Tekukor,
May 07
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Underside
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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.
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Links
- Herpolitha
limax on Corals of the World online on the Australian
Institute of Marine Science website: Technical fact sheet.
- Herpolitha
limax on the IUCN Red List of Threatened Species website:
Technical fact sheet.
- Herpolitha
limax on SeaLife Base: Technical fact sheets.
References
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