These fishermen of Laguna in Brazil have forged one of the most extraordinary partnerships between humans and wild animals found anywhere on Earth.

Edson is up early to fish the large numbers of mullet that migrate through these waters every May.

But there's a problem.

The water's so murky the fishermen can't see where to cast their nets.

So they join forces with the most intelligent animal in the sea.

But, like all relationships, a certain amount of patience is required.

Finally, their friends surface.

The local bottlenose dolphins are celebrities in Laguna.

In fact, Edson and his pal Alfredo know each one by name.

...Figueredo will help us catch lots and lots of fish...