That is why shark teeth are the most abundant vertebrate fossil material on the Earth and in the sea. Scalloped hammerhead on the ... of sharks have a buccal (mouth) pump and are not so-called ...

So seeing a hammerhead shark (Sphyrna tiburo ... and these babies are self-sufficient with teeth and jaws, ready to survive on their own. Access to a hammerhead embryo is very rare, which is ...