10 But all creatures in the seas or streams that do not have fins and scales—whether among all the swarming things or among all the other living creatures in the water—you are to regard as unclean.

Read Leviticus 11:10 Using Other Translations

And all that have not fins and scales in the seas, and in the rivers, of all that move in the waters, and of any living thing which is in the waters, they shall be an abomination unto you:
But anything in the seas or the rivers that has not fins and scales, of the swarming creatures in the waters and of the living creatures that are in the waters, is detestable to you.
But 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.