shelled snails text index | photo index
Phylum Mollusca > Class Gastropoda > Family Potamididae
Rodong snail
Telescopium telescopium
Family Potamididae
updated Oct 2016
if you learn only 3 things about them ...
You are almost certain to see many of large snails on mudflats in the mangroves.
It is edible and was eaten in the past, less so these days.
It is a harmless herbivore, nibbling on algae.

Where seen? This large snail is about the size and shape of an ice-cream cone! It is commonly seen in our mangroves, on mud, sometimes in the hundreds covering a large area. It is also called 'Rodong' or 'Berongan' in Malay.

Features: 8-15cm. The largest snail seen on our mudflats, the heavy conical shell is actually beautifully marked but the patterns are usually hidden by mud and other encrusting animals. The outer lip is thin and not flared. Operculum small and circular. The animal is velvety black with a highly extendible proboscis. There is a third eye on its mantle margin, in addition to a pair of eyes at the tentacles. It can stay out of water for long periods of time.

What does it eat? Rodong sucks up detritus and algae from the mud surface at low tide, using its proboscis.

Human uses:
It is eaten and is said to be delicious when steamed and eaten with chilli. It is gathered for food in Southeast Asia and often sold in traditional markets.

Sungei Buloh Wetland Reserve, Mar 06

Sungei Buloh Wetland Reserve, Mar 06

Pulau Sudong, Dec 09

Laying eggs?
Sungei Buloh Wetland Reserve, Mar 06

Rodong snails on Singapore shores

Photos of Rodong 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.
  • Abbott, R. Tucker, 1991. Seashells of South East Asia. Graham Brash, Singapore. 145 pp.
FREE photos from wildsingapore tagged with Potamididae. Make your own badge here.
links | references | about | email Ria
Spot errors? Have a question? Want to share your sightings? email Ria I'll be glad to hear from you!
wildfactsheets website©ria tan 2008