And this won't just be happening at vents -- it's a threat to the entire ocean. Global warming could cause oceans to become 170% more acidic by the end of the century, according to a report released last year.
While this study focused on small fish only, the researchers expected the ramifications of the problem to reverberate up the food chain. The study reads:
"Continuous exposure does not reduce the effect of high CO2 on behaviour in natural reef habitat, and this could be a serious problem for fish communities in the future when ocean acidification becomes widespread as a result of continued uptake of anthropogenic CO2 emissions."