Along with Memphis the Sth White Rhino (my first ever favourite individual animal in fact, so glad he is still around) Cheers
@Zoofan15 for including him in the list and Maly the Sun Bear. Some other individual that thought might be candidates also specifically with Perth Zoo:
Tricia the Asian Elephant (Jan 24, 1957 to July 6, 2022) wild-caught as calf in Vietnam, brought to Perth via Singapore on January 23, 1963, along with companion same age female calf Tanya (1957-2003). Tricia lived alone for over 21 years from July 1971 to December 1992 (Tanya was sent to Ashtons Circus 07.1972). Until three orphaned Ele' calves 0.2 Permai and Teduh (Teduh euthanised May 07, musculoskeletal condition) and 1.0 Putra Mas arrived 12.1992 from Malaysia. Tricia and Permai were best friends and companions. Tricia was the most famous individual animal at Perth Zoo possibly ever and her death was mourned by countless Western Australians and probably beyond (the Perth town hall lit up lights shaped like her as a dedication to her after she died). She got a much better exhibit to live in from 1986 until mid 2000s when moved to even bigger one (previous long been Putra Mas's living space). She was also a great painter like her bestie and pseudo adopted daughter Permai. Their paintings being sold to raise money for Elephant conservation charities amongst other things.
Misha the Rothschild's Giraffe (most famous for the photo of her kissing her first newborn baby 1.0 Mukulu, apparently photo was seen around the world. (Mukulu was born 27 October 1995 exactly 4 years to the day since Misha had arrived at Perth Zoo {27.10.91} from Orana Wildlife Park NZ where she was born 31 July 1990). Misha was unfortunately euthanised in May 2016 aged 25 due to suffering chronic osteoarthritis. From what understand she had at least 7 births including Mukulu and according to the zoo's website has about 58 descendants as of the time of her death.
Alistair the African Lion (January 1986 to March/April 2007) the last Lion to be born at the zoo (unsure of his littermates but his sire was also his grandsire and as a result the zoo never planned to breed with him). Joined by companions 0.2 Manzi & Mafuta (b 1992 as littermates) from Melbourne Zoo in 1994. Long tenure as the zoo's sole male lion.
Puan (c.1956-2018) the wild born female Sumatran Orangutan (arrived at zoo last day of 1968 with 1.1 other wild-caught Sumatran Orangs' Atjeh & Binte and 0.1 Bornean Orang' Mawas, all sent from the Sultan of Johore, Malaysia) and her many descendants (11 offspring including daughter Puteri (1970) now the oldest Orangutan at the zoo and her daughter (grandaughter) Temara (1993) first captive born Sumatran Orangutan ever released into the wild (and there to this day). A lots been written about Puan, Puteri, Temara and other members of their family on here, just highlighting very basically.
Phillip the wild-caught Northern White-Cheeked Gibbon (1972/1973 - July 2023) who was at Perth Zoo from October 1974 until his passing nearly 49 years later and had two partners in his lifetime Racquel and Viann, and sired many offspring. Special note too, he raised his daughter Robyn from age 2 onwards when his first mate Racquel died suddenly, until Robyn reached adult age four-five years later.
Simmo the 4.75m long male Saltwater Crocodile (c.1948 - 28 November 2018) at the zoo for over 20 years (arrived March 1998 relocated from Darwin as a 'problem croc', he spent time at Jamuna Croc' facility there but was aggressive to attempts to be introduced to a mate. Very popular with visitors, seeing him at feeding time leaping 2m sometimes to catch meat and close-up through his previous glass fronted exhibit underwater. Had some gastrointestinal issue which caused his passing but his age at 70 was really good ‘innings’.
Cerro the male Galapagos Tortoise (19 September 1966 - present) at the zoo since 2005 with his younger brother Sierra. His birthday celebrations with his specially made cakes of fruit etc are very loved and popular with visitors at the zoo.