What might have drawn the shark to the shore? How is this a plausible explanation?

Since it was unusual for the young white shark to be close to the shore in July 1916, experts later theorized that the lone predator was led toward shore by scents and currents and hunger. This was a plausible explanation for the presence of a shark near the shoreline for several reasons: A plethora of organisms washed inland and the fish industry trapped tons of fish close to shore with large nets. The scent of this prey would have gained the attention of the enormous olfactory lobes located in the shark's brain. The animal can smell prey a quarter-mile away. A new smell, the scent of human waste that was dumped into the waters, also would have piqued the interest of the shark.