“…Recently, it was reported that inorganic sulfur can be assimilated from the seawater by corals ( Higuchi et al., 2021 ) even in the absence of symbionts ( Erwin et al., 2012 ). Apart from natural halogenated products, also xenogenic chlorinated molecules were found in corals ( van der Schyff et al., 2021 ). Both references support the assignment of the sulfur- or chlorine-containing molecular formulae obtained ( Table S5 Assignment of the mass signals, related to Figure 4 ).…”