Leviticus 11:9-12

9They can eat some animals that live in the sea or in the river. Those animals must have fins and scales on their bodies.

10They must not eat any other animals from the sea or the river. They must keep away from them.

11They must not touch the dead bodies of the animals from the sea or the river. They must not eat the meat from those other animals.

12Animals from the sea and the river may have fins and scales on their bodies. Those are the only ones that you can eat. Those without fins or scales are unclean.