There was actually a group of biohackers working on producing lab cheese a while back ("Real Vegan Cheese" IIRC) that included producing narwhal cheese as a str

There was actually a group of biohackers working on producing lab cheese a while back ("Real Vegan Cheese" IIRC) that included producing narwhal cheese as a stretch goal in their crowdfunding campaign. Sadly I don't think they've gotten even as far as cow thus far.