| Summary: | Newly fertilized zebrafish (Danio rerio) embryos were exposed to increasing concentrations of the selective serotonin reuptake inhibitor (SSRI) citalopram from fertilization until six days post-fertilization (dpf). Locomotor activity data were acquired at six dpf using an automated ZebraBox® infrared tracking system. Individual (n = 32) locomotor activity was recorded during 75 minutes in total during alternating illumination conditions (0% light, i.e. dark periods, and 100% light, i.e. light periods). The first 15 minutes of the test consisted of a dark period, i.e an acclimatization phase. Afterward, six alternating light and dark periods were conducted. Individual zebrafish embryo-larvae locomotion was tracked and aggregated in ten-second bins. The dataset, containing nine locomotor-related quantified endpoints (factors), was parsed, analyzed, and visualized using R software. The dataset and its associated custom R script may be used to further explore locomotor activity outcomes (e.g. anxiolytic or anxiogenic properties) following exposure to citalopram or other neuroactive chemicals. Keywords: Zebrafish, Behavior, Locomotor activity, Developmental biology, Developmental neurotoxicology
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