Leviticus 11:9-12

⁹"These you may eat, of all that are in the waters. Everything in the waters that has fins and scales, whether in the seas or in the rivers, you may eat. ¹⁰But 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 an abomination to you. ¹¹They shall remain an abomination to you; of their flesh you shall not eat, and their carcasses you shall have in abomination. ¹²Everything in the waters that has not fins and scales is an abomination to you.