Effects of the pharmaceuticals gemfibrozil and diclofenac on the marine mussel (Mytilus spp.) and their comparison with standardized toxicity tests

► Effects of the pharmaceuticals gemfibrozil and diclofenac in marine species. ► Biomarker response indicates oxidative stress and tissue damage effects in mussels. ► First report of standard toxicity data using Skeletonema costatum and Tisbe battagliai.