Aetobatus ocellatus (Spotted eagle ray)

https://fishesofaustralia.net.au/home/species/2034

From Fishes of Australia: A large dark dark greenish-grey (to almost blackish, sometimes pinkish) eagle ray with white spots and rings (rarely ocellated spots), and a white underside. The species has a broad flattened diamond-shaped disc, five gill slits on the underside, a flattened snout, and a long tail armed with venomous spines.

In Australia, this species was previously known as Aetobatus narinari, a species found in the Atlantic Ocean.