Distribution of galaxy mergers in the example cluster Abell 85. Top: Spatial distribution of galaxies in the cluster out to 5 R₂₀₀ showing merging galaxies (orange stars) and non-merging galaxies (blue dots) relative to intracluster filaments (black lines). The pink circle denotes the R₂₀₀ radius for reference. Bottom: Normalised distribution of D_fil, comparing merging galaxies (orange) with the non-merging galaxy population (blue) at r < 5 × R₂₀₀. Symbols are as in Fig. 1. In this cluster mergers are significantly closer to filaments by a factor of 2.6, compared with non-merging galaxies.