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Phylum Mollusca > Class Gastropoda > Family Littorinidae
Black-mouth mangrove periwinkle snail
Littoraria melanostoma
Family Littorinidae
updated Oct 2016

Where seen? This rather large periwinkle is sometimes seen on mangrove tree trunks and sometimes even leaves. Usually seen alone.

Features: 2-3cm. Shell with a narrower tip, smooth, yellow with fine spiral pattern of brown dots. Sometimes the shell is bleached white. Shell opening with black edge. "Melanostoma" means "black mouth". Operculum dark brown. The animal is yellowish with short fat tentacles. According to Tan, it releases egg capsules into the sea every two weeks during the spring tides when the sea level rises to reach it.

Berlayar Creek, Jan 09

Chek Jawa, Jan 02

Sungei Buloh Wetland Reserve, Mar 05

Berlayar Creek, Jan 09

Black-mouth mangrove periwinkle snails on Singapore shores

Photos of Black-mouth mangrove periwinkle snails for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map



  • 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.
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