[6] T. indivisa have been observed living in small clumps on all coasts of the British Isles[6] and are widespread in Britain and Ireland.

[6] They have also been observed growing through sheets of sponges (such as Myxilla incrustans and Halichondria panicea), as well as through patches of the barnacle (Balanus crenatus) and the tubes of some amphipods (Jassa spp.).

In the month of July, T. indivisa accounted for 59–82% of total biomass at this shipwreck as it plays an important role in this habitat.

These findings supported that shipwrecks in Belgian waters provide development and in turn, a high biomass of T. indivisa species on a repetitive annual cycle.

T. indivisa has been replacing Metridium senile, thus becoming the dominant species on UK shipwrecks where the tidal currents are strong.

T. indivisa is also a habitat for the potentially pathogenic Endozoicimonas elysicola, which is suspected to play a role in amoebic fish disease.

These larvae can settle 1–10 kilometres (0.6–6 miles) from the parental source and reach sexual maturity at a rapid rate.