Possible Clues:

• Seafood restaurant choice
• Shellfish
• Common paella ingredients
• They're pulled from the shell, in a Squeeze song title
• Seafood paella option
• Black marine bivalves
• Did Molly Malone wheel her barrow with them and with the sound of them?
• Brawn, we hear, is seafood
• Fish restaurant order
• Seafood servings with shells