What type were the "Finding Nemo" seagulls?

The 2003 animated movie, "Finding Nemo," was set in Australia, where the silver gull is the most common type of gull. The seagulls were notable in the film for repeating the phrase "mine" while greedily searching for food.

The silver gull is notable for having a white body and tail, light grey back, and wings with black tips. A bright orange-red coloring can be found on the legs, bill and eye-ring of the adult silver gull. These characteristics are seen in the seagulls portrayed in "Finding Nemo." These birds are notable scavengers, tend to travel in large flocks and nest in sizable colonies.