No it didn't happen. It was a group of smaller sharks (bull sharks I think). There was no giant GW attacking boats and hunting people vengfully. I'm sure somewhere on multiple occasions people were attacked by gators in flood water.
I cite an example where a shark (species and number unknown) hunted/killed multiple people in a small town in the Northeast over a short period of time causing mass panic and you say that because there was no drunken Irishman hired to stop the attacks then it's got nothing to do with "Jaws." I mean it is called "the true story of Jaws" (and similar rashes of multiple shark attacks in the same place have occurred many times) and is cited as Benchley's inspiration, but oookay.
But... "I'm sure" people were killed by gators in flood water - but can't think of any. Not to mention attractive young women battling alligators inside a house during a hurricane.
Let’s not compare this film to the brilliance that is JAWS.
Anyways
First I heard about it being a “group” of Bull Sharks... But yes the 1916 attacks have been put on the Bull shark. The shark swam up a small creek that connected to the ocean.. Bull sharks live in both salt and fresh water so that is why they assume it was a Bull and not a GW.... Nobody knows for sure though.
From National Geographic “There’s some debate if a bull shark was responsible for the deaths in Matawan Creek because they are known to inhabit fresh and brackish waters; however, Burgess says the evidence points to the young great white. ”