Olympics along with an echidna and a kookaburra, Expo Oz the platypus was the mascot for World Expo 88, which was held in Brisbane in 1988, and Hexley the platypus is the mascot for the Darwin operating system, the BSD-based core of macOS and other operating systems from Apple Inc. Since the introduction of decimal currency to Australia in 1966, the embossed image of a platypus, designed and sculpted by Stuart Devlin, has appeared on the reverse (tails) side of the 20-cent coin. The platypus has frequently appeared in Australian postage stamps, most recently the 2015 "Native Animals" series and the 2016 "Australian Animals Monotremes" series. In the American animated series Phineas and Ferb (2007–2015), the title characters own a pet bluish-green platypus named Perry who, unknown to them, is a secret agent. Such choices were inspired by media underuse, as well as to exploit the animal's striking appearance; additionally, show creator Dan Povenmire, who also wrote the character's theme song, said that its opening lyrics are based on the introductory sentence of the Platypus article on Wikipedia, copying the "semiaquatic egg-laying mammal" phrase word for word, and appending the phrase "of action". As a character, Perry has been well received by both fans and critics. Coincidentally, real platypuses show a similar cyan color when seen under ultraviolet lighting. See also Henry Burrell Ellis Joseph Fauna of Australia Venomous mammal Citations References Books Documentaries DVD EAN 9398710245592 External links Biodiversity Heritage Library bibliography for Ornithorhynchus anatinus Platypus facts View the platypus genome in Ensembl Ornithorhynchidae Monotremes Semiaquatic mammals Electroreceptive animals Mammals of New South Wales Mammals of Queensland Mammals of South Australia Mammals of Tasmania Mammals of Victoria (Australia) Venomous mammals Articles containing video clips Extant Miocene first appearances Quaternary animals of Australia Quaternary animals of Oceania Mammals described in 1799 Taxa named by George Shaw