Live lobsters need to be kept alive and fresh until they're cooked to prevent deterioration. You can store them briefly in the fridge or in a lobster tank.
Storing Lobster in a Fridge:
Ideally, live lobsters should be cooked the same day they're delivered. However, they can be kept for one additional day when stored properly. In a fridge, keep lobsters as cold as possible in an open container such as a cardboard box. Pack them with seaweed or damp newspaper to keep them moist but not wet. Never store them on ice or in tap water, as the fresh water will kill them.
Storing Lobster in a Tank:
Lobster tanks enable you to keep lobsters for several days after they are delivered, and they provide a focal point for customers. If you are considering purchasing a tank, do your research and ask a lot of questions. Tanks should have an adequate filtration system, materials resistant to breakage and mold, and backup power systems.