Shark week 3: free stuff for the shark-obsessed
“Rise of the Great White Shark – A History 11 Million Years in the Making” is excellent, with tons of great footage and some very nicely-done explanations of the sensory and thermoregulatory adaptations of great whites and other sharks — and, whaddayaknow, a fact-based, non-sensationalized, and still awesome segment on megalodon.
I also learned a lot from “Shark Business”, about the growing ecotourism business of boat- and scuba-based shark tours or shark encounters. Two things in particular stood out: first, because sharks don’t have hands, their exploratory way of interacting with objects in their environment is to give everything a test bite. The vast majority of shark “attacks” on humans consist of a single bite, with a quick disengagement and no pursuit of the human by the shark. It’s just that sharks have super-sharp teeth and incredibly powerful jaws, and even a comparative gentle (to the shark) test bite can leave a person severely injured or dead. That sharks most often don’t intend any harm is probably cold comfort to people who have been subject to test bites, but it’s a useful thing to understand if you’re genuinely interested in sharks.
The other thing that jumped out at me is the 50-second segment that starts at 7:45, in which a tour guide is shown pushing on the snouts of great white sharks with his bare fingers as they approach the boat. The sharks roll their eyes back, open their mouths, and seem to go catatonic for a bit. Although they don’t make this connection explicitly in the doc, sharks generally roll their eyes back when they go in for a bite, presumably to protect their eyes from the object they’re sampling. I wonder if the nose touch signals to the shark that it’s bite time, and it rolls its eyes back, opens its mouth, and waits for something to bite down on. It seems like a useful thing to be aware of in case a shark is ever coming at you — a gentle push on the snout might put the shark into zombie mode for long enough to get out of the way. On the flip side, if you push the shark’s snoot and don’t get out of the way, it might be super-primed to take a hunk out of you. Note: I am not a shark expert, this is not professional advice, and I assume no liability if a shark eats your arm off. I just thought it was an interesting bit of shark biology that could conceivably pay off in an emergency.
Is this really going to be a whole week of shark posts? Beats me! I’m making this up as I go. Let’s find out.
Source: https://svpow.com/2022/11/08/shark-week-3-free-stuff-for-the-shark-obsessed/
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