They found that more than 80 percent of the deep water and more than 50 percent of surface water had methane levels more than eight times that of normal seawater. (nsf.gov)
Under normal seawater conditions, more than 99.99 % of the hydrogen ions that are produced will combine with carbonate ion (CO32 ---RRB- to produce additional HCO3 — . (metlink.org)
In normal seawater (8.15 pH) the clownfish have no problem finding the reefs and anemones that they typically call home. (treehugger.com)