They look like dark all over, though, but that might be because I was a distance away and could not get any closer...
https://www.flickr.com/photos/41442363@N08/41598288111/in/dateposted-public/
...did wonder if they were divers but that is surely a bit mad.
https://www.flickr.com/photos/41442363@N08/41598288111/in/dateposted-public/
...did wonder if they were divers but that is surely a bit mad.