Fat Innkeeper Worm
Fat innkeeper worm may refer to: *''Urechis caupo'', a species of spoon worm in North America *''Urechis unicinctus ''Urechis unicinctus'', known as the fat innkeeper worm or penis fish, is a species of marine spoon worm in East Asia. It is found in Bohai Gulf of China and off the Korean and Hokkaido coasts. It is not to be confused with a closely related s ...

Urechis Caupo
''Urechis caupo'' is a species of spoon worm in the family Urechidae, commonly known as the innkeeper echiuran, the fat innkeeper worm (because the tunnels often contain other animals), the innkeeper worm, or the penis fish. It is found in shallow water on the west coast of North America, between southern Oregon and Baja California, where it forms a U-shaped burrow in the sediment and feeds on plankton using a mucus net. Description ''Urechis caupo'' is a plump, unsegmented, cylindrical pink worm growing to a length of up to , with being a more typical length. There are a pair of setae (bristles) on the ventral surface at the anterior end, and a distinctive ring of about ten setae around the anus at the posterior end. The proboscis is short. Distribution and habitat Shallow water in the northeastern Pacific Ocean is the habitat of ''U. caupo''; its range extends from southern Oregon to northern Baja California. It lives in a burrow in muddy sand in the lower intertidal and the ...
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