Help ID please ! [wollongong NSW, aus]

In the rich biodiversity of tide pools along the coast of Wollongong, NSW, a curious couple was discovered measuring approximately 3 cm in length. This vibrant ecosystem, teeming with life, often presents intriguing species that warrant identification. The user, known as u/SnooDucks7746, seeks assistance in determining the species of these small marine creatures found about an hour south of Sydney. Engaging with the community can enhance our understanding of oceanic life and promote stewardship of these vital habitats. Your insights are invaluable!