ARP87 involves smaller galaxies at great distance – 300 million lyrs away in Leo.

Note the connecting bridge, which is the significant feature here.

PlaneWave 12.5″ Astrograph with ZWO ASI 6200 camera, Astrodon filters and ASA gearless DDM-85 mount. F/8 LRGB (31/8min L, 5/8min RGB each, all 2×2 bin).