From The cRc: Nori Sheets

In Important Alerts, Newsletter Items by kosherqu

Due to reports that non-Kosher crustaceans are occasionally being mixed into plain Nori Sheets, as well as shared oven lines with non-Kosher product, the cRc recommends only buying Nori with a reliable Kosher symbol.  As the Nori Sheets will have a reliable symbol there is no longer a need to check each sheet against the light for insects.