MacEwan University 1 article published in JoVE Neuroscience A Novel Method of Drug Administration to Multiple Zebrafish (Danio rerio) and the Quantification of Withdrawal Adam Holcombe1, Melike Schalomon1, Trevor James Hamilton1 1Department of Psychology, MacEwan University A novel method for reducing variability when exposing fish to drugs is explained. Fish exposed to various patterns of ethanol exposure were found to have altered anxiety levels during withdrawal in a light/dark scototaxic assay.