Leviticus 11:9-12 - Clean And Unclean Aquatic Animals
9 These you may have for food of all things living in the water: anything living in the water, in the seas or rivers, which has special parts for swimming and skin formed of thin plates, may be used for food. 10 All other things living and moving in the water, in the sea or in the rivers, are a disgusting thing to you; 11 They may not be used for food, and their dead bodies are disgusting to you. 12 Anything in the water which has no special parts for swimming and no thin plates on its skin is disgusting to you.