There was a T. Rex of the sea and it was terrifying
A new species of marine reptile, Tylosaurus rex, has been identified from fossils found in Texas. This massive creature, which could grow up to 43 feet long, lived during the age of dinosaurs and is related to the well-known T. Rex. The discovery was made by Amelia Zietlow, who determined that the fossils were misidentified and belong to a distinct species.
- ▪Tylosaurus rex is one of the largest mosasaurs known, growing up to 43 feet long.
- ▪The species was identified from 80-million-year-old fossils primarily found in northern Texas.
- ▪Amelia Zietlow, the lead author of the study, discovered that previously misidentified fossils belonged to a new species.
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There was a T. Rex of the sea and it was terrifying Gail Sherman 11:10 am Mon May 25, 2026 Shan_shan / Shutterstock.com An examination of fossils found decades ago revealed a new species of T. Rex. This T. Rex swam in the ocean but was undoubtedly as terrifying as its terrestrial namesake. Growing up to 43 feet long with serrated teeth, the newly described Tylosaurus rex, or "king of the tylosaurs," is one of the largest mosasaurs known to date. This massive marine reptile lived during the age of dinosaurs and its description is based on 80-million-year-old fossils found primarily in northern Texas decades ago.
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