I'm sure there are two galaxies doing something here, I'm just not entirely sure what went on in the past billion or so years to get a big, fluffy line of stars, gas, and dust all stretched out like that.
A color view is available at the Legacy Survey Viewer:
(Beware the big green artifacts)
All Channels: ACS/WFC F606W
North is 8.88° counter-clockwise from up.