https://youtu.be/N566PCNAK3E
Sharks are an oddity. The archetype itself never did anything relevant in the era it was introduced (Zexal). It mostly was just pack filler. Thanks to last year's set Eternity Code and this year's Brothers of Legend , the deck can finally function!
The deck aims to use Buzzsaw shark and a number of extenders to make rank 4's and control the game.
Number 4: Stealth Kragen is a great control tool. Combined with Gozen Match, you can create a very potent lock that is difficult to out.
You also have easy access to Utopic Draco Future
I purposely omitted a side deck, as you can just chose what fits to your local metagame.
Feedback appreciated