It takes years of education and training

You'll be surprised.

https://us.whales.org/2016/01/21/huge-prehistoric-whales-found-in-egyptian-desert/#:~:text=The whale bones were found,feet (20 metres) long.

Sand sharks always ride in single file to hide their numbers.

I'm not sure if you're serious or not so, just in case, here's an fyi: catfish, sea snakes, bony fish, and even Plesiosaur fossils have been found in the Sahara desert. Unsurprisingly, environments change over time and deserts are no exception.