It was described by Bernard in 1896 and is found at depths of 5 to 20 metres (16 to 66 ft) in shallow rocky areas and reefs.

This colonial species is found as irregular encrusting plates and has non-uniform corllites.

[3] T. irregularis is a zooxanthellate coral that houses symbiont dinoflagellates in its tissues.

[1] Figures of its population are unknown and its population is considered to be decreasing, but is likely to be threatened by the global reduction of coral reefs, the increase of temperature causing coral bleaching, climate change, human activity, parasites, and disease.

It is found at depths of between 5 and 20 metres (16 and 66 ft) in rocky areas and reefs.