Tabulate corals are colonial corals.
Some tabulate corals grew as mounds, with shared corallites spreading upward and outward into spherical mounds. Another type grew in mound-like groups, that had the appearance of chains or sometimes organ pipes. These types of tabulate corals are particularly common in Silurian and Devonian strata in Kentucky. Halysites is the most common type of chain-form, colonial tabulate coral. This type of coral is common in Silurian limestones.