Leviticus 11:9-10

9“Of all the marine animals, these are ones you may use for food. You may eat anything from the water if it has both fins and scales, whether taken from salt water or from streams.

10But you must never eat animals from the sea or from rivers that do not have both fins and scales. They are detestable to you. This applies both to little creatures that live in shallow water and to all creatures that live in deep water.