Could ocean acidification improve fish hearing? We usually associate ocean acidification, which occurs when carbon dioxide is absorbed by oceans, with negative impacts such as weakened shells on shellfish. However, a study conducted by the University of Miami, USA and NOAA has discovered that low-p-H water could improve fish hearing.
Researchers used 3C x-rays to compare the skulls of cobia raised in either low-pH water or higher-p-H water. They found that fish raised in lower p-H water had larger and more dense otoliths (ear stones). This could potentially lead to better hearing.