“…In contrast, no negative effects of diclofenac on embryo development have been reported in common carp (Stepanova et al, ) and brown trout (Schwarz et al, ). In ecotoxicological assays of chemicals, zebrafish are increasingly used to examine abnormal embryogenesis, and there are many reports that abnormal embryogenesis is induced in zebrafish by various chemicals including agricultural chemicals (Cao et al, ; Jia, Mao, Zhang, Zhang, & Jiang, ; Maharajan, Muthulakshmi, Nataraj, Ramesh, & Kadirvelu, ; Sulukan et al, ; Yao, Yu, Zhou, Xiang, & Xu, ), pharmaceuticals (Chen et al, ; Félix et al, ; Kovács et al, ; present study) and metals (Horie, Yamagishi, Koshio, et al, ; Sun et al, ; Yin et al, ). These studies suggest that zebrafish embryos are particularly sensitive to chemical exposure.…”