Leviticus 11:9-12

9‘These you may eat, whatever is in the water: whatever has fins and scales in the waters, in the seas, and in the rivers, these you may eat;

10but whatever does not have fins and scales in the seas and in the rivers, of all the teeming life in the waters, and of all the living creatures that are in the waters, they are [to be considered] detestable to you.

11They shall be hated things to you. You may not eat their meat; you shall detest their carcasses.

12Everything in the water that does not have fins and scales is detestable to you.