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Phylum Mollusca > Class Gastropoda > Family Cypraeidea
Ovum cowrie
Cypraea ovum
Family Cypraeidae
updated Feb 09
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.

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.

Features: 2-3cm. Shell
pear-shaped, with 'teeth' that are tinged yellow or orange. It does not have spots at the front end of the shell.

Sometimes confused with the Wandering cowrie (Cypraea errones) which is similar but is cylindrical in shape. It does not have coloured 'teeth' and has a brown spot or spots at the front end of the shell. 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.

Leave cowries alone: Mother wandering cowries often lay their eggs under stones and then stay over their eggs. So if you see a cowrie under a stone, please don't rip it off. You might inadvertently separate a mother from her eggs!

St. John's Island, Jun 07
With mantle retracted

With eggs.
Chek Jawa, Oct 03

Underside

Ovum cowries on Singapore shores


Changi, May 09


Tuas, May 05


Sentosa, Apr 08

more photos of ovum cowries on Singapore shores
northern shores | southern shores
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