Millepora dichotoma, the net fire coral, is a species of hydrozoan, consisting of a colony of polyps with a calcareous skeleton.

Symbiotic zooxanthellae give M. dichotoma their vibrant colors, support structural growth, and assist with nutrient cycling.

Male gametes are broadcast slightly before females release their eggs in order to achieve a higher success rate.

After their planktonic stage, the polyps will settle and adhere to hard substrates, become hosts to symbiotic zooxanthellae, and build calcareous skeletons.

Similar to other coral species that are supported by symbiotic zooxanthellae, M. Dichotoma responds to increases in ocean temperatures with bleaching events.