Risso's dolphin in Ganges harbour

We received a call from Fisheries last week asking us to find and identify a reported very sick-looking killer whale in Ganges harbour.  After following the animal for about an hour we were able to positively identify it as a Risso's dolphin. These animals are usually found offshore and are highly social, so it was very strange to see one in shallow waters here.  The last reported sighting of a Risso's dolphin in these waters may have been as long ago as the late 1970's.  When we left it, it was behaving fairly typically and heading out of the harbour.  We don't know exactly why it ended up here on its own and hope that it has since made it back to its usual habitat.