Multiple choice general knowledge culture Jews are forbidden from eating which of these? Duck Lobster Tuna Tomato Reveal answer Fill a bubble to check yourself B Correct answer Explanation Under Jewish dietary laws (kashrut), shellfish are forbidden as they lack fins and scales. Lobster is a shellfish and thus not kosher, while duck (properly slaughtered), tuna (has fins and scales), and tomatoes (plant-based) are permissible.