3 types of marine life and how they are affected by the increase of acidity in the oceans?

The decrease in our Oceans PH is too small (worst case 0.02) to be measurable by most equipment. Local PH changes can wipe out local life, but there is not a real affect on our Oceans (in total) from any perceived changes in PH.

Studies showing CO2 levels wildly high (over 1%) show the change would still be in the area of 0.6 overall. Pollution in localized areas is a far worse and real situation. This can cause massive changes in local PH levels. Shipping and human activities are to blame for these changes.