'Fins' in the Bible

"'These you can eat from all creatures that are in the water: Any creatures in the water that have both fins and scales, whether in the seas or in the streams, you may eat.

But any creatures that do not have both fins and scales, whether in the seas or in the streams, from all the swarming things of the water and from all the living creatures that are in the water, are detestable to you.

Any creature in the water that does not have both fins and scales is detestable to you.

These you may eat from among water creatures: anything with fins and scales you may eat,

but whatever does not have fins and scales you may not eat; it is ritually impure to you.