Because of this, it was probably a hypercarnivore, feeding on tough prey like ammonites or other placoderms. It's bite force has been estimated at 750 kg. Dunkleosteus was one of the largest, and probably the most powerful.
These ancient fish had osteoderms, plates of exposed bone that could have served as protection. Some consider it to be the largest of all Plesiosaurs.ĭunkleosteus was a genus of Placoderm, an entire class of fish that has been extinct since the end-Devonian, around 360 million years ago. It was also extremely large, growing to nearly 11 meters in length. It was an apex predator, and is known to have fed on smaller Plesiosaurs. It that lived in shallow seas across the Pacific Ocean during the Mid Cretaceous. Kronosaurus was a genus of Pliosaur, which is a family of Plesiosaurs known for proportionally shorter necks and more robust bodies. Basilosaurus was an apex predator, probably feeding on smaller whales such as Dorudon. It possessed small hind limbs, which are not visible in modern whales, although the bones still exist in some species. It also lacked the "melon" which is used for communication and echolocation. The brain of Basilosaurus was not as large as that of modern whales. Due to its "serpentine" physique, it was originally though to have been a Mosasaur.
Being a cartilaginous fish, very little of Helicoprion has been preserved, so not much is known about it.īasilosaurus was a large predatory whale from the Eocene. However, recently it has been determined that this whorl was actually the animal's teeth. Helicoprion is most known for its extremely bizarre "tooth whorl." While named in 1899, paleontologists initially had no way of knowing what the whorl was used for or even its position on the body. Big thanks to Concaventor Wrangler, DragonSaber73, Michael Benucci, and Therapod King for helping create this list.
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