Rhiannon Marie Fish (born 14 March 1991) is an Australian-Canadian actress. Her first screen acting role was Lisa Jeffries in the television soap opera Neighbours. She starred as Rocky in the Disney Channel show As the Bell Rings and as Laura in Playing for Charlie. From 2010 until 2013, she played April Scott on Home and Away. Fish took part in season 13 of Dancing with the Stars, and she joined the recurring cast of The 100 as Ontari in 2016.
Fish was born in Calgary, Alberta, Canada. Her family relocated to Melbourne when she was four years old. Her father was transferred to Russia for work when she was 12, but decided to keep the family in Australia. Fish attended the Camberwell Girls Grammar School and the Children's Performing Company of Australia, which she graduated from in 2008. Fish decided to pursue an acting career when she was eleven years old. Her older sister, Corinne, died in July 2014.