Reply to the Letter to the Editor by Joanna Szlinder-Richert [Chemosphere 80 (2010) 191–192] on the discussion of the paper ‘‘Polybrominated diphenyl ethers (PBDEs) in selected fish species from the southern Baltic Sea” by Joanna Szlinder-Richert, Iwona Barska, Zygmunt Usydus, Roman Grabic [Chemosphere 78 (2010) 695–700]