March of the Molluscs

Ha ha, yes of course! Wasn't thinking of that at the time, but it is appropriate.

But four young Oysters hurried up, All eager for the treat: Their coats were brushed, their faces washed, Their shoes were clean and neat-- And this was odd, because, you know, They hadn't any feet. Four other Oysters followed them, And yet another four; And thick and fast they came at last, And more, and more, and more-- All hopping through the frothy waves, And scrambling to the shore.