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Wandering
cowrie
Erronea errones
Family
Cypraeidae
updated
Jul 2020
if you
learn only 3 things about them ...
Cowries are often well camouflaged. Look carefully for
them.
Their shells are highly prized, thus cowries are threatened
by over-collection.
Don't
rip off a cowrie from a stone! It might be a mother cowrie
protecting her eggs. |
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Where
seen? This
little cowrie is commonly seen on our Northern shores usually under
stones, but sometimes crawling about in the open. Sometimes also seen
on our Southern shores among coral rubble. It was previously known
as Cypraea errones.
Features: 2-3cm. Shell
cylindrical, generally pale blue with 3 broad pale brown bands and small brown speckles all over. Sometimes, but not always, with a big brown blotch in the middle. There may be one or two brown spots
at the front tip of the shell, sometimes no spots. Underside white without
coloured 'teeth'. The living animal has a dark
mottled mantle.
Sometimes confused with the Ovum
cowrie (Cypraea ovum) which is similar but is pear-shaped,
does not have spots at the front end of the shell and has 'teeth'
that are tinged yellow or orange. Here's more on how
to tell apart Wandering and Ovum cowries.
When the shell is completely covered in its mantle, it is sometimes
mistaken for a sea slug. Here's more
on how to tell apart
slugs and animals that look like slugs.
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Sisters Island, Jan 11
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Shell cylindrical with one or two spots.
Sisters Island, Jan 11
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Teeth' not coloured.
Sisters Island, Jan 11 '
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Leave cowries alone: A mother
cowrie stays over her
eggs after she lays them, covering the egg mass (usually yellowish) with her foot. So if you see a cowrie under a stone, please don't rip it off.
You might inadvertently separate a mother from her eggs! |
Mama cowrie under a rock,
protecting her egg mass with her foot.
Sentosa, Apr 10
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Wandering
cowries on Singapore shores |
Other sightings on Singapore shores |
Labrador, Nov 18
Photo shared by Loh Kok Sheng on facebook. |
East Coast-Marina Bay, Nov 17
Photo shared by Loh Kok Sheng on facebook.
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St John's Island, Feb 24
Photo shared by Vincent Choo on facebook. |
Pulau Tekukor, Mar 24
Photo shared by Chee Cheng Neo on facebook.
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Terumbu Bemban, May 21
Photo shared by Vincent Choo on facebook.
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Beting Bemban Besar, May 17
Photo shared by Toh Chay Hoon on facebook.
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Links
References
- Tan Siong
Kiat and Henrietta P. M. Woo, 2010 Preliminary
Checklist of The Molluscs of Singapore (pdf), Raffles
Museum of Biodiversity Research, National University of Singapore.
- Tan, K. S.
& L. M. Chou, 2000. A
Guide to the Common Seashells of Singapore. Singapore
Science Centre. 160 pp.
- Abbott, R.
Tucker, 1991. Seashells
of South East Asia.
Graham Brash, Singapore. 145 pp.
- Kuiter, Rudie
H and Helmut Debelius. 2009. World
Atlas of Marine Fauna. IKAN-Unterwasserachiv. 723pp.
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