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6 unbelievable animals

Frilled shark head

Photo: Wikimedia

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Frilled shark

The frilled shark is straight out of central casting for prehistoric sharks and has been called a "living fossil" due to its unique and seemingly evolutionarily stunted features. It's not clear just how much direct lineage the frilled shark shares with ancient sharks, but even the possibility of a connection is exciting.

Whatever its origins, the frilled shark is one of the stranger things swimming in the ocean. The frilled shark has been found all over the Atlantic and Pacific oceans and seems to prefer feeding near biologically rich upwellings.