Zebrafish embryos were exposed to eriocitrin from 6 hpf to 5 dpf. The number of survivors was counted under a MZ16F stereoscopic microscope (Leica Microsystems). One hour before evaluation of locomotor activity, a fish was removed from each experimental unit and placed in a well with 50 μl of E3 medium in a 96-well, clear-bottom plate for acclimatization. The fish were then video-recorded for 15 min. The resulting footage was evaluated to measure the swimming distance using the EthoVision XT system ver8.0 (Noldus Information Technology, Wageningen, The Netherlands) as described previously60 (link).