Leviticus 11:9-12

‘These you may eat of all that are in the water: whatever in the water has fins and scales, whether in the seas or in the rivers—that you may eat. But all in the seas or in the rivers that do not have fins and scales, all that move in the water or any living thing which is in the water, they are an abomination to you. They shall be an abomination to you; you shall not eat their flesh, but you shall regard their carcasses as an abomination. Whatever in the water does not have fins or scales—that shall be an abomination to you.