.... like some sort of permanent oysternami.

hansel&gretal
Suddenly, they took over. By the turn of the twentieth century the mussel beds were densely covered like some sort of permanent oysternami. There were up to 300 of the bastards per square metre. Now it’s thought that there are around 500 tons of Pacific Oysters breeding in the area, all roughly the size of an average person’s hand.
— Rachel Walker