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Phylum Mollusca > Class Gastropoda > Family Calyptraeidae
Flat slipper snail
Crepidula walshi
Family Calyptraeidae
updated Aug 10
Where seen? This snail is commonly encountered inside a shell occupied by a hermit crab. It is also sometimes found on the underside of horseshoe crabs.

Features: 1-3.5cm. Shell thin, conical or flat, usually white. It is usually found in pairs. The larger one is usually the female and the smaller one male. When the smaller one grows big enough, it will change into a female!

Sometimes confused with limpets which are also gastropods but which can move about. Here's more on how to tell apart limpets, slipper snails and similar animals.

Chek Jawa, Mar 05

Flat slipper snails on Singapore shores

Changi, Jun 05

Changi, Apr 05

Changi, Jul 04

On a mangrove horseshoe crab.


Sisters Island, Jan 11

References

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