A bivalve with paper-thin shells and about 40 mm wide. It had broken orange bands radiating from the umbo (where the valves are hinged). A very fragile specimen that was surprisingly intact despite being blown about in the wind. The slightly flared part of the shell near the umbo (on the Lt side in Pic 1) is called the auricle or wing, giving the species it's common name.
This coiled thin shell with pale orange bands is that of a marine gastropod/snail that lives in a coiled tube. The snails resemble tube worms (polychaetes) because of the structure but are in a different family. The tube is usually cemented to other structures. Unlike other snails, this species does not have an operculum or lid.
A bird dropping imitator but quite large so maybe an emu dropping mimic. This fat-bottomed girl was clutching onto what seemed to be a sac of eggs. Estimated abdomen size to be 16mm - the same size as the sac. As a pair they resembled some large nuts or seed pods but the species of shrub didn't produce anything similar.