If you think oyster, mussel, clam, and scallop cookery seem best left to the experts, then think again. In reality, much of the onus of prep work comes down to choosing exceptionally fresh shellfish — after that, the effort to reward ratio is high. With that in mind, we've rounded up crucial guidelines for shopping for shellfish, starting with one of our favorite categories of mollusks, the humble bivalve.
Generally speaking, bivalves should be purchased alive, since these creatures decompose exceptionally quickly once dead, even when properly stored on ice and refrigerated. Most of the qualities listed below indicate whether or not the animal inside the shell is still living.
Things to Bear in Mind When Buying Clams, Oysters, or Mussels
- In their raw state, these bivalves should feel heavy for their size.
- Like all seafood, these should smell of the ocean — briny and sweet, like seaweed — and not off-putting or "fishy" in any way.
- If shellfish are prepackaged in mesh bags, ask to open up the bag to get a better look, as it's tougher to tell the condition of the shells when bagged.
- Shells should be tightly closed, with no chips or cracks present. An open shell indicates that the creature is already dead (and will have begun to decompose). Once ready to prep or eat raw, sharply tap any that are slightly ajar; if alive, shells should close — and if any don't, make sure to discard. Likewise, once cooked, the shells should open up slightly — this indicates that the shellfish was alive when cooked — any that stay closed should be discarded.