This is a paper nautilus, which strictly speaking isn't really a shell at all, it is more of an egg basket!!!
The argonaut, or paper nautilus, is actually an octopus. Females make a parchment-like shell to carry incubating eggs and control where they swim in the water column.
Simply amazing these are so delicate. This one has a small hairline crack at the edge but is in otherwise perfect condition.
We can not ship this delicate piece, it is available for collection only from our Noosaville warehouse.
Measures approx: 15cm x 10cm x 5cm