Answer: shellfish

AnswerCrossword Clue
SHELLFISH

Clams and oysters

SHELLFISH

Clams and crabs

SHELLFISH

Scallop.

SHELLFISH
What an underwater gunner can do
SHELLFISH
Mollusks
SHELLFISHNonkosher food
SHELLFISHOyster, e.g.
SHELLFISHMollusk or crustacean
SHELLFISHCause of some allergic reactions
SHELLFISHWhat some are allergic to