Food from an unapproved supplier, unsafe or spoiled food, missing shellfish harvest tags, or raw fish without required parasite destruction.
High-risk food (like meat) thawed improperly, promoting bacterial growth.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.