The Meg was one of the biggest marine animals ever to prowl the ocean, reaching lengths of up to 60 feet and weights of over 50 tonnes. This was truly the devil of the seas.
The next on the list is "mighty mosasaurus”, a fearsome extinct predator with a six-foot skull and 250 teeth. This ancient crocodile was 56 feet long and weighed a hefty 30,000 pounds. It lived from about 82 to 66 million years ago.
The Smilodon, or Saber-toothed Tiger, was a huge predatory cat that lived during the Pleistocene era and roamed North and South America. It had a powerful jaw and long canine teeth, which were used to take down enormous prey like horses, bison, and even mammoths.
A huge pterosaur known as Quetzalcoatlus flourished in the Late Cretaceous era. It is believed to have been among the largest creatures to ever fly. The wingspan of this pterosaur may have been as broad as 10 to 11 metres. It used to exist 65 million years ago.
A species of large constrictor snake was called a Titanoboa. The largest species was Titanoboa cerrejoninsis, though there were other species as well. Palaeontologists estimate that it had 250 vertebrae and that it could grow as long as 42 feet. It existed 60 million years ago.
The Helicoprion was a fearsome jawed predator that lived from the early Permian Period until the early Triassic Period. It is thought to have had a curving, spiral-shaped jaw with several hundred teeth that might extend up to three metres in length.
Consider a 6-feet long scorpion with a body shaped like a paddle that is used for swimming. The pentecopterus decorahensis existed about 460 million years ago. It was first discovered in 2015.
A hazardous species of extinct bear known as Arcdotus lived during the last ice age up to 11,000 years ago. This rapacious predator roamed in North America, eating wild horses, deer, and even enormous sloths.
This lethal extinct animal was a 30-pound raptor that existed until the 1400s native to South Island in New Zealand. The Maori people tell tales of Haast's eagles snatching kids, their natural prey, before the moa bird was hunted to extinction.