Clams -- Velvety Jewels of the Sea: Aladdin's Cave on the Looney Front
Clam chowder. Clam bake. Clam up. Tight as a clam. As happy as a clam. OK, but you don't normally associate the filter-feeding, plankton-feasting bivalve mollusc -- you probably won't use that term either -- with gems.  Oysters, yes, but clams?
clams velvety jewels sea aladdin cave looney clam chowder clam bake clam tight clam happy clam ok normally associate filter feed plankton feast bivalve mollusc probably will use term gem   oyster yes clam