Gift-bearing magic anon here! I can’t get you sharks, but I Can offer a tank of robo-dunkleosteus. Actually, the robo-dunkleosteus might suit your living quarters better than organic sharks. But it comes with a trade! You’ll have a shadow for the day. Not a ghost Optimus, or even anything that talks, but it will follow you until midnight. If you accept the terms, the toothfishes are yours.

((Reference))

The titanic beasts circle their tank, which has taken up one of the walls in his quarters. The water churns, and the three robotic fish gnash their bladed teeth.

He already has a shadow. Terms accepted.