Is Cruel Jaws Jaws 5?

No. Jaws 5 was the international video release title of Cruel Jaws. It has no connection to the storyline of the Jaws movies.

The only connection it has to the Jaws series is it uses clips from the Jaws series and the 1980 film Great White. Bruno Mattei thought his 1995 film would be more popular if it was called Jaws 5. He also printed the covers of his movie with the trademark "Jaws Mako" design.