The 19-year-old swimmer received recognition for her outstanding efforts in the pool at the WA Swimmer of the Year Awards on Saturday.
Top performers and their families attended the annual presentations at the State Reception Centre in Kings Park on Saturday.
Throssell was selected to represent Australia at the Nanjing Youth Olympic Games last August, coming home with a swag of medals.
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READ NOWThe Australian Dolphin swimmer claimed seven bronze medals at the Youth Olympic Games, including three individual medals in the Women's 200m freestyle and 100m and 200m butterfly events.
The athlete, who trains with the Perth City Swim Club, backed up the strong showing in Nanjing with a standout performance at the Australian Short Course Titles in November. Throssell, formerly of Gooseberry Hill, claimed two national titles by winning the women's 200m butterfly and 800m freestyle events.
Her outstanding performance at the Short Course Nationals led to representing Australia at the FINA World Short Course Championships in Qatar, where she made the final of the 200m butterfly. In January, Throssell stole the spotlight at the 2015 State Championships by claiming 10 State titles.
She broke numerous State records on her way to securing the SCODY scholarship for the top-performing female age athlete at the meet.
Throssell's outstanding year capped off with selection for the Australian Dolphin team that will compete at the 2015 FINA World Championships in Kazan, Russia later this year, following her silver medal in the 200m butterfly at the Hancock Prospecting Australian Open Long Championships.
She will be the youngest female member of the Australian Dolphin team competing at the world championships.