A dense clump of pale orange seaweed (red algae) with oak-leaf shaped fronds/thalli.
Washed-up onto the beach off Westernport Bay (Balnarring Beach).
This species gets it's name "quercifolia" fro the oak-shaped fronds.
It is reported that this is a common and distinctive species found in deep waters in the rough-water coasts of southern Australia.
My thanks to Janine Baker for the ID.