Development and evolution of dolphin, whale blowholes

New research is shedding light on how the nasal passage of dolphins and whales shifts during embryonic development from emerging at the tip of the snout to emerging at the top of the head as a blowhole. The findings are an integrative model for this developmental transition for cetaceans.

source https://www.sciencedaily.com/releases/2021/08/210816142358.htm