Batspray!!!

Catwoman: Riddler, you fool! Penguin must have finished them by now!

Riddler: Why, that stupid waddling mountebank of a bird? He couldn't finish a bag of popcorn!

Riddler: You and your trained exploding sharks.

Penguin: How was I supposed to know they had a can of shark-repelling Batspray handy, you sniveling sardine?!

Here I go, poking fun at Batman And Robin Together With All Their Fantastic Derring-Do And Their Dastardly Villains, Too! - and now THIS.

Believe it or not, Sharkdefense, the inventor of "Semiochemical Repellents" has come out with SD-1, an aerosol canister to repel Sharks!!!
Really??? Really!!!

And they are currently testing it on Bull Sharks!
Thankfully for us, they're only selling the stuff to "qualified" (yup, that wud be an oxymoron!) Government, Safety and Fisheries Agencies as I would just hate to see somebody deploy it at Shark Reef - as you well know, we don't want to repel Sharks, we go to great lengths in order to attract them!

And I hear, it works with Lawyers, too!
Who's the mountebank now?