shells are very sensitive to minor perturbations in, for instance, salinity and temperature. They will emerge from their burrows if salt or brine is poured in. Disease Razor shells have been found to be vulnerable to germinoma, a variety of tumour. References External links Razor shells in Norway Effect of dredging on razor shell populations Pharidae Marine molluscs of Europe Marine molluscs of North America Molluscs of the Atlantic Ocean Molluscs described in 1865