The world phenomenon found along the Spencer Gulf mainly at Point Lowly has attracted people from all around the world.

Not only have they attracted divers, but also television shows such as Postcards and Getaway.

They have appeared in a 3D IMAX documentary Under The Sea, which featured amazing sea creatures around the world, and was narrated by Jim Carrey.

These cuttlefish are starting to put Whyalla on the map.

What is unique about the giant cuttlefish, also known as the sepia apama is that they are much larger than those found in other locations.

Some scientists believe the cuttlefish at Point Lowly are a "distinct genetic pool", which can't be found anywhere else.

The giant cuttlefish are found in incredible numbers, in fact thousands, swarming the rocky shores between False Bay and Fitzgerald Bay.

The brightly coloured cephalopods congregate to mate between the winter months of May and August.

They grow up to 60 centimetres long and weigh up to five kilograms.

A larger male cuttlefish is more likely to attract a female's attention when it comes to mating.

One of the most spectacular things to see on a cuttlefish is its ability to change colours and patterns, which the smaller male must do in an effort to attract a female.

By changing its colours and patterns, it appears to be more like a female which distracts a larger male from moving in on the female.

This then allows the smaller male and the female to mate.

Females do not live much longer after their reproduction.

Cuttlefish are also smart when it comes to their defence mechanisms.

When threatened, the cuttlefish sucks water into their body and quickly expels it to propel them away.

Giant Cuttlefish have become so well known and in such high demand to witness that they have turned Whyalla's lowest tourist season, winter, into its highest.

In 2009 the Whyalla Visitor Centre and Whyalla Dive Shop owner Tony Bramley saw the highest amount of tourists they had ever seen.

The spectacle attracted 20 Americans, several Canadians, New Zealanders, Russians, Brazilians and even two Lithuanians.

They weren't just stopping over to see something along the way, they came to Australia, to Whyalla, purely to see the cuttlefish.

It's as special to them as what maybe the Great Barrier Reef may seem to others.

There is no other place in the world that these giant cuttlefish could be found, and anyone can see them.