Later in my GBS fandom, after I acquired a succession of iPhones, I was able to start taking my own concert pictures. These are from the show that GBS played at the Moore in Seattle on 3/8/2013, during their tour for the XX boxed set commemorating their 20th anniversary.
My sneak preview post about the show is here, and the full writeup for the concert can be found over here!

Séan During England
Séan McCann performing "England" with Great Big Sea at the Moore in Seattle, 3/8/2013.

B’ys and Their Mermaid
Great Big Sea performing in front of their mermaid album art at the Moore in Seattle, 3/8/2013.

Bob Plays Everything
Bob Hallett playing ALL THE THINGS at the Great Big Sea show at the Moore, 3/8/2013.

Bob Plays Everything
Close-up shot of Bob Hallett playing ALL THE THINGS at the Great Big Sea show at the Moore in Seattle, 3/8/2013.