The Australian third-ounce platinum piece (abbreviated as 1/3oz and designated with Pt for "Platinum") is a bullion coin format used by the Perth Mint since 2018 for a series of bullion coins featuring different Australian animals.
This coin was first one issued by the Perth Mint in the platinum 1/3 oz format, and features the Emperor Penguin.
The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species and is endemic to Antarctica. The male and female are similar in plumage and size, reaching 100 cm in length and weighing from 22 to 45 kg. Feathers of the head and back are black and sharply delineated from the white belly, pale-yellow breast and bright-yellow ear patches. Like all penguins it is flightless, with a streamlined body, and wings stiffened and flattened into flippers for a marine habitat. Its diet consists primarily of fish, but also includes crustaceans, such as krill, and cephalopods, such as squid. While hunting, the species can remain submerged around 20 minutes, diving to a depth of 535 m.
The reverse designs shows a standing Emperor Penguin.
The Perth Mint's P mint mark is in the right field. Below left, in tiny letters the initials of the designer, JM, for Jennifer McKenna.
In the rim, which is patterned with thin radial lines, the inscription 2018 EMPEROR PENGUIN around above, and AUSTRALIAN ANTARCTIC TERRITORY around below.