Leviticus 11:9-12

9These shall ye eat of all that are in the waters: whatever hath fins and scales in waters, in seas and in rivers, these shall ye eat;

10but all that have not fins and scales in seas and in rivers, of all that swarm in the waters, and of every living soul which is in the waters — they shall be an abomination unto you.

11They shall be even an abomination unto you: of their flesh shall ye not eat, and their carcase ye shall have in abomination.

12Whatever in the waters hath no fins and scales, that shall be an abomination unto you.