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Keep in mind that MOST of what we know about these creatures is based on supposition and whatever data has been collected thru limited means (really limited means based on the rules and regulations that are entailed when studying these fish).
You can't seriously expect a fish, an apex predator, to just be content to wait for food to come to it?
I wonder how long Bull sharks spent "testing" their tolerance to fresh water before it became part of their genetic /evolutionary makeup?
Imagine having a 10-20' shark that was able to traverse and tolerate the waters of the Connecticut, North, Charles and Merrimack rivers?
Our "saving's grace" has been the combination of the water temps and the salinity of these waterways.
It looks like the Great Whites are tackling the temperature aspect pretty nicely!
Let's hope that the seals NEVER develop an affinity for fresh water!!
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