We used a two-way ANOVA (microscopy_signal ~ time * conditioning) with Tukey’s post hoc test to compare bleaching rate between PC and NPC corals. We used a three-way ANOVA analysis with Tukey’s post hoc test (microscopy_signal ~ time * conditioning * treatment) to test the similarity of bleaching rate between PC and NPC corals treated with venetoclax or with DMSO. Controls (corals treated with venetoclax or with DMSO at ambient temperature) were analyzed as an independent experiment.