Economic Importance for Humans: Negative
Naval shipworms have many negative effects due to their wood boring activity. They have been noted to cause damage in ships and dikes. Weakening of dike gates, combined with a heavy storm, resulted in flooding of the Netherlands in 1731. Teredo navalis also eat away at piers and wharfs. In San Francisco Bay, they can cause 200 million dollars worth of damage yearly.
- USDA, 2006. "Submodule 7: The Price We Pay -- Economic Impacts" (On-line). National Invasive Species Information Center. Accessed June 06, 2011 at http://alic.arid.arizona.edu/invasive/sub7/p2.shtml.