Selected high-density regions for CARLAJ1358+5752 at z = 1.368. Passive and active galaxies are shown in red and blue, respectively. ETGs are shown as circles. LTG are shown as squares (disks) and diamonds (irregulars). The cluster spectroscopic members are marked by a small yellow circle, when they are black they are not included in our magnitude, colour and spatial selection but are shown to better explain our overdensity selection. The RLQ is shown as a star. The bar shows S/N levels.