"They know that a whale shark will almost always carry a school of tuna underneath it," Afonso told Live Science. (It remains a mystery as to why tuna accompany whale sharks, he added.)

"When you're a shark you're a shark all the way, from your first tuna fish to your last dying day!"

Because no one is going after the tuna while they're with their bodyguards!

Sitting in my tin can... I think I should have stayed with the Whale Shark. That was a pretty sweet deal we had. Damn! 

Aww. It's like a protection racket!