Japanese hypermarkets and retail outlets in Suma City resumed selling seafood such as seashells and crabs in the northeasterly Japanese prefecture of Fukuchima today for the first time since last year\'s nuclear incident. The Japanese Fishery Cooperative Society reported that no radioactive substances have so far been detected in seafood since last Friday at 150 meters depth some 50 kilometers off Suma coast, and added that these products had been cooked prior to shipping them to local retailers and seafood markets in other parts of the Japanese prefecture. Today\'s sales included octopuses and seashells sold at 40% below average market rates.