6 Shark-fetus teeth. A few shark species have live births (instead of laying eggs). The Jaws juniors grow teeth in the womb. The first sibling or two to mature sometimes eat their siblings in utero. Mmm … siblings.
didn't mention the woodpecker's tongue (look it up)
Illustration: Roman Klonek 1 Sea mammal blowhole. Any animal that spends appreciable time in the ocean should be able to extract oxygen from water via gills. Enlarging the lungs and moving a nostril to the back of the head is a poor work-around. 2 Hyena clitoris. When engorged, this “pseudopenis,” which doubles as the birth canal, […]