Sinum perspectivum (Say, 1831) White Baby Ear Burrowing
Sinum perspectivum (Say, 1831) Burrowing
When excavated from the substrate, the specimen appears to be shapeless blob of flesh.
Sinum perspectivum (Say, 1831) Burrowing
In a matter of moments, the foot is extended and the specimen begins burrowing in the sand.
Sinum perspectivum (Say, 1831) Burrowing

Burrowing continues, and in less than a minute, the specimen is again completely buried.

Big Talbot Island, Duval County, Florida 5/6/2004 (24 mm.)