Number of filaments connected to a cluster, N_fil, versus the cluster mass, M_cl. Symbol sizes are proportional to the number of components in a cluster, N_comp. The numbers are order numbers of a cluster from Table 2. Red symbols show the number of all filaments, and blue symbols the number of long filaments with $F_{\mathrm{len}}^{\mathrm{l}}\ge 5h^{-1}$ Mpc. Light red and orange symbols and dark blue symbols correspond to clusters with higher values of star-forming galaxies, A1367 and A1185 (clusters 2 and 3).