Bayscallops belong to the same family: They are much smaller, about half an inch, but can be substituted for sea scallops (use three bayscallops in place of one sea scallop).
In Mr. Cole's final Slow Food Fast recipe, tender, tiny bayscallops, diced honeydew, cucumber slices and bits of cipolline onion are served in a pool of chilled melon juice spiked with serrano chili.