Meanings of razor shell in English

Remove, flip the fish over and cook for one minute more; at the same time, put four razor shell halves into the oven to heat.

The shattered blue, black, striped fragments of razor shells have accumulated around tufts of windblown grass.

Some hardy people perhaps foolhardy go along beaches gathering mussels for eating, periwinkles, too, or rake up cockles from the sand, and even razor shells.