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Spinosarus
(mander.xyz)
Theory (it's possible): https://tetzoo.com/blog/2020/11/27/trope-of-the-buffalo-backed-dinosaur
The spines on a buffalo are a lot thicker and shorter. Any muscle attached to the spines of a spinosaurus would snap them in half.
Also the buffalo's spine bones are elongated over it's shoulders, whereas the spinosaurus has elongated spine bones start after its shoulders.