Scientists in the U.K. say they might have found a colossal 180 million-year-old fossil.

The remains are of an ichthyosaur, otherwise known as a sea dragon.

It was found in the Rutland Water Nature Reserve.

The dinosaur is nearly 33-feet long and its skull weighs 1 ton.

Scientists called it an apex predator that was once at the top of the food chain.

Researchers say this discovery is the largest and most complete fossil of its kind ever found in the region.