This is the data set for a publication titled, "Coupling carbon dioxide gas within a bubble curtain enhances its effectiveness to deter fish." The current study sought to quantify whether adding carbon dioxide gas (CO2) to a bubble curtain would enhance its efficacy to block fish. For this, a choice tank was outfitted with bubble curtains infused with either compressed air alone, or with two different concentrations of CO2 [30 or 100 mg/L]. Passage rates and position of common carp (an invasive Cyprinid) and black bullhead (a native Ictalurid) exposed to these treatments were compared. The data set consists of data from each of the experiments performed during the study.