ok but why are they testing sharks for cocaine?

Regulatory compliance, sir.

Look, anyone exposed to Baby Shark suspected the involvement of cocaine. Someone had to test.

Casting for the sequel

The sharks kept on making air quotes with their fins.

Security clearances.

Shark wanted to compete in the olympics

DUI (diving while intoxicated)

Ain't no rule says a shark can't play basketball... but that shark's gotta pass a pee test like everyone else.

They watched Sharknado and Cocaine Bear in the same day and had some ideas

Maybe it’s part of the sharks with lasers initiative