Amelia Lester

I first want to acknowledge, though...

the tragic and unthinkable devastation that a family in Sydney is going through.

That is the family of 12-year-old Nico Antic, who was jumping off a rock west of Shark Beach on Sunday afternoon when he was bitten by what is believed to be a large bull shark.

And his heroic group of friends, who are his age,

jumped in and pulled him from the water.

But those injuries that he sustained are reportedly so significant, with a close friend describing this heartbreaking event as having led to the worst possible outcome.

I just think it's important to say this little boy did nothing wrong.

He did nothing irresponsible.

So many kids jump off those rocks.

You would not think twice about it, right?

In the following days, there was a boy whose surfboard was bitten.

Then there was a man attacked at Manly Beach.

He is in a critical condition and another man injured while surfing near Port Macquarie.

So...

Why is this?

Have we been hearing the word brackish water a lot lately?

We have.

Well, in relation to this.

Yes, yes.

So brackish water means a mix of fresh and salt water and it happens after heavy rainfall.