Kuphus polythalamia being removed from its shell.MARVIN ALTAMIA(See D.L. Distel et al., “Discovery of chemoautotrophic symbiosis in the giant shipworm Kuphus polythalamia (Bivalvia: Teredinidae) extends wooden-steps theory,” PNAS, doi:10.1073/pnas.1620470114, 2017.)
Image of the Day: Giant Shipworm
Kuphus polythalamia is a worm-like mollusk that can reach up to 155 cm in length, is encased in a hard, tusk-like shell, and lives in sulfur-rich mud.

