Cerithidea obtusa is a species of sea snail, a marine gastropod mollusk in the family Potamididae.^[1] The Obtuse Horn Shell, also known as Mud Creeper, is a relatively common snail found in muddy coastal areas. It grows to around 5–6 cm. It is used as a food in Southeast Asia, where it is known by the name of Belitung and Siput Sedut in Malay, Hoi Joob Jaeng (Thai: หอยจุ๊บแจง), and Ốc Len in Vietnamese.

Cerithidea obtusa
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Sorbeoconcha
Superfamily:	Cerithioidea
Family:	Potamididae
Genus:	Cerithidea
Species:	C. obtusa
Binomial name
Cerithidea obtusa (Lamarck, 1822)
Synonyms[1]
Potamides obtusus (Lamarck, 1822)

It can crawl up to a height of 7 metres, where, once it reaches the highest point on a tree, it will then jump off the tree trunk and fall back onto the mud.

Many South East Asians eat the mud creeper as a dish, particularly in Malaysia, southern Thailand, certain parts of Indonesia, and Vietnam.