A key question then clearly remains: What is causing the internal bleeding?
As of now, that's still a mystery. A statement released by the Silicon Valley city mentioned, "The...pathologist is not drawing any conclusions until more examinations and all tests are performed."
A bacterial study and microspoic tissue analysis are underway. Investigators have not ruled out a human-caused spill of toxic chemicals, although no big spill has been reported in the region over the past couple of months.
Sean Van Sommeran, executive director of the Pelagic Shark Research Foundation in nearby Santa Cruz, suspects "we're only seeing a tiny fraction of what's going on," meaning more sharks and other animals are likely being affected by the problem.
Van Sommeran added that leopard sharks are typically a "pretty resistant" species.
I have to wonder...If whatever is in the water is doing this to a sturdy shark, what in the world is it doing, or could it do, to us? Perhaps the cause is shark-specific, such as a pathogen affecting only leopard sharks, but I'd like to see the proof.