Anything that goes past their territory, although later even if they're not hungry.

I'm trying to find out what lies beneath the surface of this river, where I'm told Australia's largest freshwater fish could be hunting.

So I've taken the plunge.

That was very interesting.

Very interesting.

Underwater is a whole other world.

You could get lost down there.

This is gonna really help me fish.

There's so much water that I might walk past so many places for fish to hide.

Even in water like this, even big finish to hide in water like this.

It's very easy to imagine something lurking out of sight.

And from what I've heard about the memory card on this aggressive behavior, this territorial behavior in the back of my mind was this thought that at any moment something could just I don't know, Ram.

Me sort of suddenly needs to hear from the way it's a whole other world, and it's a spooky world, and it's actually quite a scary world with this fresh perspective, like a better focus.

My approach to find the memory card no pool will be ignored.

Time to tackle up my fly rod.

Unlike the deep water in the damn, this river is shallow and full of weeds.

A fly line should glide along the surface of the water.

On the fly will imitate a small crayfish.

These flamboyant creations have a sting in the tail.

Time to gear up and head out.

This is my country.

That's why I'm not going.

Sandals are not going barefoot.

I've got waiting boots on there with sort of neoprene socks on, which is possibly slightly overdressed for this heat.

But it's no overdressed for snakes.

The water here is really clear, which is so from expressing.

It means I can see the fish, which is great.

But they can see me, which isn't so great.

So I have to keep my head down below the horizon.

It's very challenging.

It's it's look at the water, working out yet your tactics, How you gonna position yourself?

How you gonna cost my first attempts?

Don't attract any attention.

The next day I continue my search.

I've already covered so much water without success, but I can't stop.

I'm also getting reports that a storm is coming finally some water for this parched land.

But the last thing I need is to be caught in a flash flood.

I ventured deeper into the river system and keep searching suddenly like a switch.

I miss it.

I miss it.

My fly.

Barely.

It's the water before it's attacked.

Yes, every cast has become a target.

Like Holmes Connect.

Ah, but I can identify the fish.

Positive ideal.

Murray card.

It seems that the impending rain and promise of higher water yes, have brought the beast out of hiding.

Now they're notorious aggression.

Suspicion on territorial nature.

Just coming after again are in full view.

He's gonna go after again like this is gonna go through again.

It's taken again.

Oh, they do seem to be very aggressive.

Get too close to where they live.

They don't like that.

Then in a deep Doc Poole, that's it.

Following us following.

It's going.

It's going Yes, yeah, Official official.

Right, John.

Got to.

Gotcha.

There we go.

My record on duh.

It's a chunky fish.

Amazing.

They're just hammered.

That surface floor just just came up to it and bang aggression.

These fissure all about aggression.

It's when they want to feed.

But it's also when you get in their face when you get too close to where they live there, just out there at you.

Judging by its size, this one has been stalking these waters for the best part of a decade.

A big one of these, I think easily might have accounted for that story.

Look at this all day.

But being a fish, I don't want it too long out of the water, all sorts of things all around the world.

This is one that I never thought I would see on the end of my line.

And here it is.

These things, e.

I think it is part of their character.

It's like, Let me go You know that old king of the river and they know it, you know?

What are you doing?

Just leave me alone.

Bomb gone.

That is the Murray called for you.

My journey started with a classic fishermen's tale off a terrifying encounter with beast in the dark waters of the Australian Outback.

From everything I've seen and learned since then, I've no doubt it was a Murray called This is a powerful when they want to be very aggressive and territorial fish like this is gonna go through again.

He's gonna go through again.

And when the swimmers came to close, it triggered an explosive response.

But this story is much more than that.

To see a fish come back from the brink in the way the Murray Cod has done is something really special.

It's still got some way to go, of course, but it shows what can happen if a fish is given a fighting chance on that.

Is this story worth sharing?

Yeah.