Sea Life Melbourne Aquarium (Was the Melborne Aquarium)

Sea Life Melbourne Aquarium is a Southern Ocean and Antarctic aquarium in central Melbourne, Australia. It is located on the banks of the Yarra River beside and under the Flinders Street Viaduct and the King Street Bridge. The attraction is a Sea Life Centre owned by Merlin Entertainments.
In April 2013, Melbourne Aquarium's owners announced that they would be spending $8 million on the refurbishment of the facilities. As part of the process, the aquarium was rebranded as a Sea Life Centre and relaunched in September 2013.
Wikipedia

The Aquarium is completely cashless and so are the penny presses and medallion machines.

All machines are behind pay walls, tickets ranging between $51 for adults to $37.50 (AUD) for children, tickets can be bundled with the Lego Discovery Centre (who also have a penny press machine).
Medallion machines are $6.50 per design, in the first two machines and varies in the machine depending on design.
Penny presses are $2.50 per design.

Machine 4: Located halfway through the aquarium opposite the large crocodile enclosure. Pressing onto preloaded copper blanks.
1) Turtle,
2) Stingray,
3) Octopus,
4) Sawfish.

Machine 5: Located at the end of the aquarium, just at the exit of course through the gift shop, Pressing onto preloaded copper blanks.
1) Seahorse,
2) Shark,
3) Penguins,
4) Clownfish.

Token Machine 1: Located halfway through the aquarium opposite the large crocodile enclosure, both are push and hold button operated machines.
1) Turtle,
2) Crocodile,
3) Green Tree Frog.

Token Machine 2: Located halfway through the aquarium opposite the large crocodile enclosure, both are push and hold button operated machines.
1) Black Reef Shark,
2) King and Gentoo Penguin,
3) White Spotted Eagle ray.

Token Machime 3: Located at the end of the aquarium, just at the exit of course through the gift shop, this machine has a selection of 6 medallions to choose from using touch screen operation.
1) Black Reef Shark $8,
2) White Spotted Eagle ray $8,
3) Koala (24K) $12,
4) Kangaroo (24K) $12,
5) Finders St Train Station (24K) $12,
6)King and Gentoo Penguin $8.

Retired machines (Melbourne Aquarium designs)

Retired 1: 1) Young Penguin, 2) Penguin baby and mother, 3) Penguin, 4) Aquarium Logo.
Retired 2: 1) Thresher Shark, 2) Great White Shark with mouth open, 3) Nurse Shark, 4) Shark going up.
Retired 3, 1) Penguin, 2) Penguin with crown, 3) ????, 4) ????

2/07/25: Formally known as Melbourne Aquarium (Which closed in 2012) it is now known as Sea Life Melbourne Aquarium.

2/9/25: Some artwork added, awaiting designs from company and description of designs added AOK