Coral-hydrozoan co-occurrence dataset from Corals hosting symbiotic hydrozoans are less susceptible to predation and disease.

The dataset report detailed information about all coral colonies investigated in the study. This includes sampling region (Maldives or Saudi Arabia), a unique identifier for sampling site, depth class, coral genus, colony size class, a binary field indicating the occurrence on the colony of symbiotic hydrozoans, and 8 binary fields indicating the presence of signs of various coral health conditions, namely: coral bleaching, coral algae overgrowth, fish bites, gastropod (Drupella spp.) bites, white syndrome, brown band disease, skeleton eroding band disease, black band disease.