"TIL we thought dolphins couldn't breathe through their mouths until 2016, when a dolphin with a damaged blowhole learned to mouth breathe"
But it seem to be true:
https://www.journaldequebec.com/2016/08/19/un-narval-adopte-par-des-belugas-dans
-le-fleuve-saint-laurent
I'm curious, what became of those folks when covid hit and all the ships were drydocked?