And then I approached her too fast.

And that's when she left the den and got a real fright...

and didn't come back to that den.

And I thought this was over.

She was gone.

I'd had this experience with these incredible San master trackers.

I just thought, "I wonder if anybody could ever track anything underwater?"

This animal has spent millions of years learning to be impossible to find.

And that was very frustrating at first, so difficult to discern.

and heart urchin tracks

and fish tracks...

and worm tracks?

And the predation marks.

The egg casings.

I needed to learn everything.

And then you have to start thinking...

It's like being a detective.

And you just slowly get all your clues together.

And then I started to...

make breakthroughs.