What Divers Should Know About Black Coral

Venturing below 50 meters, particularly on continental slopes, you might encounter the distinctive forms of black coral, or Antipatharians. These deep-water corals are instantly recognizable by their jet-black or dark brown chitin skeletons, often surrounded by their living, colored polyps. While cosmopolitan, appearing in nearly every oceanic location except brackish waters, about 75% of species thrive below this 50-meter mark. Requiring a hard surface for attachment, they frequently grow on reefs, isolated outcroppings, cliffs, or within caves where undersea currents provide a steady food supply.

These fascinating corals are carnivorous, with polyps efficiently stinging and digesting passing meiofauna like zooplankton. Their unique fan-shaped structures are not merely aesthetic; many species strategically place polyps only on the downstream side to conserve energy while maximizing prey capture. Black corals also play a vital ecological role, providing housing, shelter, food, and protection for various other marine animals, contributing to local reef ecosystems.