Toxicity of dispersant application: Biomarkers responses in gills of juvenile golden grey mullet (Liza aurata)

► This study simulates and evaluates the toxicity of dispersant use in nearshore area. ► Dispersant use toxicity is assessed through biomarkers measurement in a fish species. ► Chemical dispersion of an oil slick increases the petroleum toxicity. ► Dispersant use does not enhance the toxicity of a mechanically dispersed oil slick. ► This work leads to conclusions concerning dispersant use policies in nearshore area.