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..I'm struggling to see this, and I haven't got any better ideas so....
Hi Graham, the shape and fins look OK for a Stickleback. The resolution is not great but I think I can see 2 spines lying flat on the back (best viewed in image 2 on the original). The third spine will be at the root of the dorsal fin and is not clear at all. It is not a 9 spined though.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
..agree not 9 spined. and understand 3rd spine at where it is.
pic 2 I'm with you.
Discovery Ranger Tom
Lat/Lng: 51.8, -5.0
OS grid ref: SM9516