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Plesiosaur

✨ The deep-sea monster

Plesiosaurs were a group of marine reptiles that lived in the oceans during the Mesozoic Era, from about 203 to 66 million years ago. They were not dinosaurs, but they shared the same prehistoric world. Plesiosaurs had wide bodies, long necks, small heads, and four powerful flippers that allowed them to move through the water.

Different species varied greatly in size, with some measuring only a few meters long while others reached more than 10 meters. They fed on fish, squid, and other marine animals, using their sharp teeth to catch prey. Unlike modern marine mammals, plesiosaurs were reptiles that needed to breathe air, so they had to come to the surface regularly.

Their fossils have been found in many parts of the world, showing that they lived in different marine environments. Scientists continue to study their bones and other remains to understand how they swam, reproduced, and adapted to life in the oceans.

Plesiosaurs disappeared during the mass extinction event at the end of the Cretaceous period, along with many other marine and terrestrial species. Today, they remain among the most recognizable animals from prehistoric seas.

💡 Did you know?

Imagine a neck made up of more than 70 vertebrae! That's the record for some plesiosaurs. For comparison, we only have 7. This incredible neck allowed it to hunt smoothly by moving its head close to schools of fish without the rest of its massive body being noticed. It was the king of stealthy underwater approaches.

Unlike whales that use their tails, Plesiosaur swam using its four flippers like bird wings underwater. It literally 'flew' through the sea! This unique technique gave it great agility to turn sharply and catch very fast prey.

Plesiosaur is often associated with the legend of the Loch Ness Monster in Scotland. Although scientists know that plesiosaurs went extinct millions of years ago, many people like to imagine that 'Nessie' is a survivor of this species hiding in the cold waters of the lake!