Top panel: Color-composite image of UG101 (at the center of the image, labeled in orange) generated from the MUSE datacube. The filter transmission curves used to integrate the flux and their corresponding red, green, and blue channels are indicated at the top. A close companion, UG101b, lies approximately 28″ to the southwest (also in orange). Bottom panel: Color-composite image of UG103, generated from the MUSE datacube. The extended greenish-yellow source located within one of UG103 spiral arms to the southeast (indicated by the yellow annotation) is identified as a background source with z_spec ∼ 0.25 (see Appendix A). Other point-like sources seen in the image correspond to foreground stars or background galaxies. A yellow arrow indicates the direction of the brightest cluster galaxy (Biviano et al. 2017).