A case of footy fever has struck at Melbourne Aquarium, with penguins hitting the ice to predict if the Adelaide Crows or Richmond Tigers will claim AFL Grand Final glory.

The gentoo and king penguins will show their true colours by choosing between club-themed fish cakes on Wednesday.

The favoured fish cake will be their predicted winner and to up the stakes, the first gentoo chick born this breeding season will be named Crow or Tiger after the upcoming premiership team.