2 Bible Verses about Fins

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. All other things living and moving in the water, in the sea or in the rivers, are a disgusting thing to you; They may not be used for food, and their dead bodies are disgusting to you.read more.
Anything in the water which has no special parts for swimming and no thin plates on its skin is disgusting to you.

And of the things living in the waters, you may take all those who have wings for swimming with and skins formed of thin plates. But any which have no skin-plates or wings for swimming, you may not take; they are unclean for you.