Otters in Perth

When I saw one of these three, at first I thought it was the mink I'd seen before. They were swimming and diving together, but looked a bit small to be otters. Now that I've looked at the pictures carefully, I'm fairly sure this is a mother and two young ones.

They were swimming right next to Queen's Bridge, and a woman who had seen them from the bridge came down to watch them with me. Is there any other place where else one can see otters right in the city?

I didn't have a telephoto lens with me, a mistake I won't repeat for some time, so the picture isn't great. Nevertheless this was a special day for me.