Data from: Ocean acidification during pre-fertilization chemical communication affects sperm success

These data contain fertilization success scores from gametes of the mussel Mytilus galloprovincialis, following sperm chemotaxis trials in two different seawater pH treatments (ambinet and experimentally lowered pH). They also contain seawater carbonate chemostry measurements (pH on the total scale and total alkalinity) from each batch of seawater at each treatment.