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Phylum Mollusca > Class Gastropoda > Family Neritidae
Red-mouth nerite snail
Dostia violacea
Family Neritidae
updated Oct 10
Where seen? This sturdy nerite was seen once at Pulau Semakau among mudlobster mounds. The study by Tan & Clements (2008) found this snail on our Northern shores as well as at Berlayar Creek.

Features: About 2cm. Shell sturdy and rounded with a sunken spire. When alive, the shell is covered with a periostracum and usually covered with silt and algae. But the shell is white with dark-purplish often solidly banded axial bands and coarse "tent" markings.

Pulau Semakau, Mar 09
The flat underside varies in colour from whitish with an orange tinge to brick-red. The teeth near the shell opening are variable, sometimes none. The operculum is smooth, similar in colour to the underside usually darker with dark blotches. The living animal is orange with black patches.

Close up of shell opening and operculum.

Underside.
Red-mouth nerite snails on Singapore shores

Mandai, Mar 11

Admiralty Park, Jun 09

Sungei Pandan, Jun 09

Kranji Nature Trail, Dec 10

Dead snail.

Pulau Ubin, Nov 09

Dead snail.
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