Leviticus 11:10-11

¹⁰And all that have not fins nor scales in the seas, and in the rivers, of all that move in the waters, and of any living animal which is in the waters, they shall be an abomination to you:

¹¹They shall be even an abomination to you; ye shall not eat of their flesh, but ye shall have their carcasses in abomination.