they say that sharks have remained mostly unchanged since their initial induction as a species on planet earth. they survived whatever took out the dinosaurs. they had the oceans (which to them is probably just referred to correctly as "the ocean" with some warmer and cooler parts ...since it's all connected ...and we're the only weirdos who break it up into multiple pieces) to themselves for 65 million years. just swimming around, loving it. seals weren't around, so what did they eat mostly until new food evolved for them? just chasing around fish one at a time? imagine how great that must have felt for them as seals began to evolve right in front of them. "guys, i don't want to get anyone's hopes too high, but meat that can swim - slowly ...is evolving right over there." and it's been a buffet ever since. and they've refused to evolve. "should we change anything? maybe figure out how to sleep without having to constantly swim? or what about finally learning to swim backwards?" "what?! no! are you kidding me?! look at us. we're kick ass." [then he does a little show-offy shark move] and as new species have evolved and proliferated in the ocean, they've had to see these prehistoric beasts trolling by. and they're just used to it. we have rhinos and alligators (some of us do) and they look old. but they're not ferocious predators that can go everywhere. oceanic life must be the equivalent to living on land and then seeing a velociraptor eat your pet or loved one.