Despite recent significant advancement in understanding the likely impacts of ocean acidification in a few coral reef fish species, effects of elevated carbon dioxide on temperate reef fish larval behaviour and sensorial capabilities have not been investigated. Here we propose an integrated comparative approach to the study of acidification on sensory systems, early life history traits, performance and brain function of temperate fish larvae, and, ultimately, on how these aspects may influence behavioural patterns relevant for dispersal and habitat detection, using a range of treatments relevant to predicted future ocean pH levels.