Have big bodies, grew long necks

 

Image courtesy oF Shutterstock/Dotted Yeti. 

Joel Kontinen 

Plesiosaurs look just like pictures of the Lock Ness monster but they are rea,.

“Susana Gutarra Díaz at the University of Bristol, UK, and her colleagues examines the body shapes of plesiosaurs and other marine reptiles through the lens of computational fluid dynamics. Some appear to have been more streamlined, such as the shark-like like ichthyosaurs  , while plesiosaurs were much more variable in shape and size. “Until now, it was not very clear how this great diversity of shapes and sizes affected the energy demands of swimming in these marine animals,” says Gutarra Díaz.”

So New Scientist says that plesiosaurs evolved awkward long necks thanks to their big bodies. that is not based on evolution, It is based on predestination. The same prestext is used for ichtysaurs. 

Source:

Black, Riley. 2022,Plesiosaurs evolved awkward long necks thanks to their big bodies New Scientist 28 April