The larger spiral is drawing the smaller galaxy on top towards it. Note the material already being transferred from the smaller one, and the up tilting of the back left spiral arm on the larger one. The arm is being distorted by the gravitational pull of the small galaxy.

12 1/2″ Ritchey-Chretien Telescope with a ST10XE/CFW8. F/6LRGB (58/7min BW,12/5minRGB2x2 bin scaled on Maxim DL at 1.0R,1.0G and 1.6B)