Cerithidea obtusa is a species of sea snail, a marine gastropod mollusk in the family Potamididae. 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 food in Southeast Asia where it is known by the name "Siput Sedut", "Belitung" or "Ốc Len" in Vietnamese. It can crawl up to 7 metres of where once it reach the highest tree, it will then jump off the bark and fall onto the mud. Many South East Asians have been seen eating this as a dish particularly in the Eastern parts of Malaysia and Vietnam.